Invalidity Analysis — US9284226 (public record)

For attorney review — not a legal opinion, not a validity determination. This reference would NOT anticipate claim 1 under §102 (MPEP § 2131); multiple limitations are absent, so the §102 ground fails on a missing-element basis. What maps: the reference discloses a dry ettringite-producing hydraulic cement blend (partial map to element (a)) and discloses 'calcium sulfate' as a component (a genus-level partial map to the calcium sulphate source, but the reference does not specify beta anhydrite, gypsum, or hemi-hydrate, so it does not clearly fall within the closed Markush group). Missing/absent limitations: (1) the reference is directed to 'high speed production of carbon dioxide resistant cement board,' not a 'gunite forming composition'; (2) it uses the open transitional 'comprising,' not the closed 'consisting of' of the claim, which further undercuts a closed-composition read; (4) no 'nucleation agent accelerant' is disclosed (hydrated lime is disclosed but is not characterized as an accelerant, and an inherency theory would require necessity under MPEP § 2112, not merely possibility); (6) the ettringite is generated from portland cement plus high alumina cement, NOT from '30% by weight of calcium sulphoaluminate' — no calcium sulphoaluminate is disclosed at all; (7)-(8) no aggregate and no 2:1–6:1 aggregate-to-cement ratio is disclosed; and (9) no quantified 1500 psi strength at 15 minutes tested per ASTM C1140/C1604 is disclosed (the reference states only generalized 'high early strength'). Because at least elements (6), (7), (8), and (9) are absent from this single reference, it cannot anticipate; a §102 rejection cannot be cured by combination (that is §103). The reference may, however, contribute to a §103 analysis (e.g., in combination with references disclosing calcium sulphoaluminate cement and aggregate).

• ⚠ Unverified reference quotation in claim chart (US4488909A — Non-expansive, rapid setting cement vs. claim 1): "A non-expansive, ettringite-producing hydraulic cement ... said hydraulic cement comprising from about 72% to about 8…" does not appear verbatim in the fetched reference text. Correct the quote or treat the disclosure as unverified before relying on it.

This reference does not anticipate claim 8. Claim 8 incorporates by reference the full composition of claim 1, and the §102 inquiry therefore requires the single reference to disclose both the claim-1 composition and the applying-to-a-surface method steps arranged as claimed. The reference is directed to an ettringite-producing hydraulic cement made from portland cement, high alumina cement, calcium sulfate and hydrated lime (claims 1-9), described in the abstract as 'especially adapted to the high speed production of carbon dioxide resistant cement board.' The available text discloses NONE of the distinctive claim-1 limitations: there is no calcium sulphoaluminate ettringite-forming cement (at 'from 30% by weight' or otherwise), no nucleation agent accelerant, no aggregate, no aggregate-to-cement weight ratio of 2:1 to 6:1, and no 1500-psi-at-15-minutes strength (ASTM C1140/C1604) requirement; moreover claim 1's closed 'consisting of' cement component would exclude the portland-cement-dominant (about 72-80% portland) system of the reference. Independently, the reference discloses forming cement board, not the affirmative step of 'applying the composition to the surface.' Because multiple limitations are absent from this single reference, no §102 anticipation is available (MPEP § 2131); the reference could at most be considered as part of a §103 combination, which is outside the scope of this single-reference anticipation chart. UNVERIFIED note: only the abstract and claims were provided — the specification was not furnished, so any broader disclosure (e.g., surface application) cannot be confirmed or relied upon.

For attorney review — not a legal opinion, not a validity determination. Only one of claim 11's four elements maps cleanly to US4488909A: the step of mixing the cement with water is expressly disclosed (Abstract: 'after it is mixed with water'). The dispositive gaps are in the composition-providing step (element 2), because the composition of claim 1 (incorporated through claim 11) requires (a) a nucleation agent accelerant, (b) a calcium sulphate source, (c) 'from 30% by weight of calcium sulphoaluminate as an ettringite forming cement,' and (d) an aggregate at a 2:1–6:1 aggregate:cement ratio — none of which the reference's provided text discloses. US4488909A instead achieves ettringite via 'about 72% to about 80% portland cement, from about 14% to about 21% high alumina cement, from about 3.5% to about 10% calcium sulfate and from about 0.4% to about 0.7% hydrated lime,' with no calcium sulphoaluminate at ≥30%, no accelerant, and no aggregate. The reference is also directed to 'high speed production of carbon dioxide resistant cement board' and provides no disclosure of applying a mixed composition to a mine/tunnel/building or any surface (elements 1 and 4). Because multiple limitations are absent from this single reference, it would NOT anticipate claim 11 under §102 (MPEP § 2131); a §102 rejection cannot be cured by combining references. The reference may remain relevant to a §103 combination analysis, which is outside the scope of this single-reference chart.

For attorney review — not a legal opinion, not a validity determination. On the text provided, US4798628A maps to the core cementitious chemistry of claim 1: it expressly discloses a clinker containing calcium sulphoaluminate (4CaO.3Al2O3.SO3) 'in an amount of from 15 to 68%,' a range that overlaps the claimed 'from 30% by weight' (element 6, though the reference range starts below 30% so it does not identically disclose the claimed lower bound), a calcium sulphate source ('a second slurry containing calcium sulfate'), a 'setting and/or hardening accelerator,' and provision of components 'as a dry mixture.' However, several claim limitations appear ABSENT from the provided text and cannot be supplied by combination under §102 (MPEP § 2131): (element 7) no aggregate/sand-gravel is disclosed — the reference discloses bentonite in the abstract, not an aggregate; (element 8) no aggregate-to-cement weight ratio of about 2:1 to 6:1 is disclosed; and (element 9) no compressive-strength value (1500 psi) at 15 minutes tested per ASTM C1140/C1604 is disclosed, and none is shown to be necessarily inherent (an inherency theory would require necessity, not mere possibility, per MPEP § 2112). Additionally, the 'gunite forming' preamble and the closed 'consisting of' scope are not squarely met; the reference addresses pump-packing/stowing of mine cavities, not gunite. Because at least elements 7, 8, and 9 are absent, this reference would NOT anticipate claim 1 as charted; it may instead be a candidate component of a §103 combination (e.g., with a shotcrete/gunite reference disclosing aggregate ratios and strength), subject to an articulated motivation to combine and reasonable expectation of success. The single weakest link for any anticipation theory is the missing aggregate ratio and the quantified 15-minute strength limitation.

The reference is only available to the charting engine as its abstract plus its issued claims, and against target claim 8 (which incorporates all of target claim 1 by reference) it maps only partially. The reference discloses a settable calcium-sulphoaluminate-based (4CaO·3Al2O3·SO3, '15 to 68%') mineral clinker composition and a method of use ('pump packing method of stowing cavities in underground mines'), which loosely reads on 'a method of applying a cementitious composition,' but 'stowing cavities' by pump packing is arguably distinct from 'applying the composition to the surface' as claimed. Critically, element (2)'s incorporation of target claim 1 is NOT satisfied: the provided text does not disclose (a) an aggregate at a weight ratio of about 2:1 to 6:1 to the cement component, (b) the specified calcium sulphate source (beta anhydrite, gypsum, or hemi-hydrate) as a defined component — indeed its preferred claims recite CaSO4 as 'essentially absent' (claim 8) or 'up to 4.1%', (c) the 'from 30%' calcium sulphoaluminate floor as arranged in a gunite/aggregate composition, or (d) the functional 1500 psi at 15 minutes per ASTM C1140/C1604 limitation. Because multiple limitations imported from claim 1 are absent from the single reference and the arrangement-as-claimed is not shown, this reference would NOT anticipate claim 8 under §102 (MPEP § 2131); the missing limitations cannot be supplied by combination in an anticipation analysis, though the reference may still be relevant to a §103 obviousness combination. Note also the aggregate ratio, accelerant identity, and strength values remain UNVERIFIED as the full specification was not provided — reliance should be limited accordingly.

• ⚠ Unverified reference quotation in claim chart (US4798628A — Settable mineral clinker compositions vs. claim 8): "A mineral clinker oomposition containing 4CaO.3Al2 O3.SO3, in an amount of from 15 to 68%, and not more than 45.6% of…" does not appear verbatim in the fetched reference text. Correct the quote or treat the disclosure as unverified before relying on it.

The mixing-with-water step (element 3) maps cleanly to the reference's abstract, which expressly describes producing the settable composition by mixing the 4CaO.3Al2O3.SO3-bearing mineral with water. The method's underlying composition (element 2) is only partially met: the reference's clinker contains 15–68% calcium sulphoaluminate (overlapping but not co-extensive with claim 1's ≥30% requirement) and mentions calcium sulfate and a hardening accelerator, but the available text does NOT disclose (a) an aggregate in the claimed 2:1 to 6:1 aggregate-to-cement weight ratio, (b) the closed 'consisting of' three-component cement architecture, or (c) any unconfined compressive strength value, much less ≥1500 psi at 15 minutes per ASTM C1140/C1604 — a limitation carried into claim 11 through claim 1. Elements 1 and 4 (applying to a surface / applying the mixed composition to the surface) are only partially disclosed: the reference teaches 'pump packing' to stow/fill underground mine cavities, which is a cavity-filling operation rather than an unambiguous application of the mix onto a surface, and would require the patentee's argument that filling a void is not 'applying to a surface.' Because at least the aggregate-ratio and 15-minute strength limitations (and the closed composition) are absent from this single reference, the chart supports a §102 verdict of missing_elements; the reference may nonetheless contribute to a §103 combination for the attorney to evaluate separately.

US4957556A discloses a cementitious mixture that overlaps with several individual claim-1 limitations of the target: it teaches calcium sulphoaluminate (C4 A3 S) as an ettringite-forming phase (Abstract / claim 9, 'C4 A3 S content of approximately 10% to 30% by weight'), a soluble calcium sulphate source ('soluble CaSO4 anhydride'; and gypsum as a raw material), and an accelerator additive (claim 8) that could arguably read on a 'nucleation agent accelerant.' However, this reference is candidate §103 material at most, not a §102 anticipation, because at least four limitations arranged as in the claim are missing or only marginally met: (1) there is no disclosure of a 'gunite forming composition'; (2) there is no aggregate whatsoever, so the aggregate limitation and the 2:1–6:1 aggregate-to-cement ratio are wholly absent; (3) the reference's compositions require 45%–85% hydraulic/portland cement, which the target's closed 'consisting of' cement component excludes — the reference cannot satisfy the closed transitional phrase; (4) the CSA content only touches 30% at its extreme upper bound (10%–30%) whereas the claim requires 'from 30% by weight' (i.e., at least 30%); and (5) the reference reports strength 'ranging from 3,000 psi to 5,000 psi in one hour,' not the claimed 1500 psi at 15 minutes measured under ASTM C1140/C1604, so the specific 15-minute early-strength property is not disclosed (and any inherency argument would fail the necessity standard of MPEP § 2112). Because at least one limitation is absent under §102 / MPEP § 2131, this reference does not anticipate claim 1; it may nonetheless contribute to a §103 combination for attorney evaluation.

• ⚠ Unverified reference quotation in claim chart (US4957556A — Very early setting ultra high early strength cement vs. claim 1): "5% to 25% by weight soluble CaSO4 anhydride ... forming a mixture of limestone, gypsum, and one of more members from …" does not appear verbatim in the fetched reference text. Correct the quote or treat the disclosure as unverified before relying on it.

The reference does not anticipate claim 8. Claim 8 is a method of applying the claim 1 gunite composition to a surface, and the reference discloses neither an applying step nor any surface — it is directed entirely to methods of manufacturing/forming a cement and the cement product itself ('Methods for forming very early setting, ultra high strength cements and the cements so produced'), with no disclosure of application/spraying or of a mine, tunnel, or building surface, so both method-step elements are absent. The underlying claim 1 composition is at most partially disclosed: the reference discloses a calcium sulphoaluminate phase (C4A3S), a soluble calcium sulphate anhydride source, and (in claim 8) an accelerator additive (aluminum sulfate, iron sulfate, or chloride), which map to portions of claim 1. However, the reference's C4A3S content in the final mixture is '10% to 30% by weight' (not the claimed 'from 30%'), the balance is 45-85% portland/hydraulic cement (which claim 1's closed 'consisting of' cement component appears to exclude), and the reference discloses no aggregate, no 2:1-6:1 aggregate:cement ratio, and no 15-minute ≥1500 psi strength (it reports 3000-5000 psi at one hour). Because at least two claim elements (the applying step and the surface) are entirely absent from this single reference and the underlying composition limitations are only partially met, there is no §102 anticipation (MPEP § 2131); the reference may at most contribute to a §103 combination for the attorney to evaluate.

US4957556A is directed to methods for manufacturing/formulating a very early setting, ultra high strength cement (clinker + hydraulic/portland cement + soluble CaSO4 anhydride), not to applying a cementitious composition to a surface, so this reference does not anticipate claim 11 and at least two limitations are absent. Element 3 (mixing with water) is at best implied by references to hydration and the aqueous reaction formula (partially disclosed). Element 2 (providing a claim-1 composition) is only partially disclosed: the reference teaches a calcium sulphoaluminate (C4A3S) phase, a calcium sulphate/anhydrite source, and, in claim 8, an accelerator additive, but its C4A3S content is stated as 10-30% (not the claimed 'from 30%'), it contains hydraulic/portland cement as balance whereas claim 1 is closed ('consisting of'), it discloses NO aggregate (and thus no 2:1 to 6:1 aggregate:cement ratio), and it recites strength 'within approximately one hour following hydration' rather than the claimed ≥1500 psi at 15 minutes after placement per ASTM C1140/C1604. Critically, Elements 1 and 4 — a method of APPLYING the composition TO A SURFACE — are wholly absent, as the reference addresses cement formation, not placement or spraying. Because a single reference must disclose every element arranged as in the claim (§102 / MPEP § 2131), the missing surface-application steps and the absent aggregate limitation preclude anticipation; the reference may at most be a component of a §103 combination for the attorney to assess.

• ⚠ Unverified reference quotation in claim chart (US4957556A — Very early setting ultra high early strength cement vs. claim 11): "a C4 A3 S content of approximately 10% to 30% by weight, a soluble CS anhydride content of approximately 5% to 20% by…" does not appear verbatim in the fetched reference text. Correct the quote or treat the disclosure as unverified before relying on it.
• ⚠ Unverified reference quotation in claim chart (US4957556A — Very early setting ultra high early strength cement vs. claim 11): "having a compressive strength on the order of 3000 psi within approximately one hour following hydration ... accordin…" does not appear verbatim in the fetched reference text. Correct the quote or treat the disclosure as unverified before relying on it.

US6113864A is directed to an entirely unrelated field — an adsorber-catalyst combination for treating internal combustion engine exhaust gas (a housing, adsorbers, and catalysts arranged in an exhaust flow path). Its available text (abstract and claims 1-17) contains no disclosure of any cementitious subject matter: no gunite/shotcrete composition, no cement component, no accelerant, no calcium sulphate source, no calcium sulphoaluminate/ettringite cement, no aggregate, no aggregate-to-cement weight ratio, and no compressive-strength property. Every element of target claim 1 is absent from this reference. Accordingly this reference does not anticipate claim 1 under §102 (MPEP § 2131), and — being from a wholly different technical field with no overlapping teaching — it provides no basis for mapping any claim limitation. The attorney should treat this reference as a non-art false positive from the corpus rather than a viable invalidity ground.