Prosecution Insights
Last updated: August 17, 2026
Application No. 18/276,440

SILICONE-POLYOLEFIN HYBRID ELASTOMERS

Final Rejection §102
Filed
Aug 08, 2023
Priority
Feb 10, 2021 — provisional 63/147,866 +1 more
Examiner
MOORE, MARGARET G
Art Unit
1765
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Dow Global Technologies LLC
OA Round
2 (Final)
68%
Grant Probability
Favorable
3-4
OA Rounds
0m
Est. Remaining
83%
With Interview

Examiner Intelligence

Grants 68% — above average
68%
Career Allowance Rate
900 granted / 1323 resolved
+3.0% vs TC avg
Moderate +15% lift
Without
With
+15.0%
Interview Lift
resolved cases with interview
Typical timeline
2y 10m
Avg Prosecution
47 currently pending
Career history
1366
Total Applications
across all art units

Statute-Specific Performance

§101
0.8%
-39.2% vs TC avg
§103
52.8%
+12.8% vs TC avg
§102
21.0%
-19.0% vs TC avg
§112
18.9%
-21.1% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1323 resolved cases

Office Action

§102
DETAILED ACTION Applicant’s arguments and amendments, filed 6/2/26, with respect to the prior art rejections of claims 1 to 20 have been fully considered and are persuasive. Therefore, the rejection has been withdrawn. However, upon further consideration, new grounds of rejection are made. See below. Claim Rejections - 35 USC § 102 The text of those sections of Title 35, U.S. Code not included in this action can be found in a prior Office action. Claims 1 to 17 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by WO 2019/182721, as interpreted by the US equivalent Swier et al. (11,332,583) for convenience. Swier et al. teach a composition that contains a polyolefin having 1 or 2 terminal silyl (SiH) groups, a polydiorganosiloxane having 1 or 2 terminal unsaturated groups and a catalyst. See column 2, lines 42 to 58. The polyolefin meets the requirement of claimed (B) when Y is a hydridosilyl group. The polydiorganosiloxane meets the requirement of claimed (A) when X is an olefinically unsaturated group. The catalyst meets the curable silicone elastomer com-ponent (C). The composition in Swier et al. contain other additives that can meet the requirement of (C), including the solvent D), the inhibitor E) and the alkoxysilyl organo-silicon compound F). Note too that the working examples, starting on column 21, line 23, are replete with compositions containing (A) to (C). In this manner claim 1 is anticipated. For claims 2 and 3, see the various Si-vinyl siloxanes B) starting in column 11 that meet these requirements. See also the siloxane in column 21, lines 30 to 35, and line 60. For claim 4, note the Mn of the siloxanes in the table on column 22. Such Mn values will necessarily reflect siloxanes that fall within the claimed DP range. More specifically the vinyl terminated polydimethylsiloxane in line 24 has a DP of 124. This specific compounds meets claimed (A) in each of claims 1 to 4. For claim 5, note that column 4, lines 45 and on, teach polyethylenes and that polyethylenes are used in the working examples. For claim 6, see the table in column 22 which shows amounts of polyolefin within the claimed range. For claims 7 and 8, note that the vinyl terminated polydimethylsiloxane noted above as meeting claimed (A) also meets the requirements for (C). For claim 9, again see the table in column 22 which shows an amount of olefinic siloxane that meets (C) and falls within this claimed wt% range. For claims 10 and 11, see the catalyst C) and inhibitor E) in columns 13 and 14. For claim 12, see column 3, line 16 and 17, which refer to the composition in the absence of any solvent. For claims 13 to 17, see the citations noted supra as they refer to each of (A) to (C), melt processing and solventless conditions, the presence of a catalyst and the resulting blend. For claims 18 to 20, note that paragraph 142 of the instant specification states that preparing the cured product generally comprises heating at an elevated Claims 1 to 4, 6, 7 and 9 to 20 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Hautekeer et al. 5,425,947. Hautekeer et al. teach a composition that contains a hydroxy terminated polydi- organosiloxane (column 3, line 21) that meets claimed (A) when X is a Si bonded hydroxyl group. This composition also contains a rheological additive which is a poly-olefin having carboxylic acid anhydride groups. The meets claimed (B) when X is an anhydride group. Finally, as for a curable silicone elastomer component (C), Hautekeer et al. teach various components such as a filler (column 4, line 15 and on), catalyst (column 5, line 22 and on), a non-reactive silicone fluid (column 6, lines 17 and on) and an adhesion promoter (column 6, lines 31 and on). In this manner each component required by claim 1, and thus the composition of claim 1, is anticipated. For claims 2 and 3 note that the specific siloxane shown in column 3, line 21, as well as those used in the working examples meet these requirements. For claim 4, see the viscosity range in column 3, line 23, which falls within the claimed range. For claim 6, see the polybutadiene used in Example 1 which as 1.35 anhydride groups and a molecular weight of 2160. This results in a wt% of Y (anhydride) group that falls within the claimed range. See also the amounts as found in column 5, lines55 to 60. For claim 7, note that column 5, lien 4, teaches the optional presence of silica. For claim 9, note the amounts of trimethylsilyl endblocked siloxane and calcium carbonate filler in the working examples, for instance Example 1, as they fall within the range of (i). In addition note that calcium carbonate is immiscible with the functionalized polyolefin. For claims 10 and 11, note that Example 1 contains a condensation catalyst (a titanate). For claim 12, note that Hautekeer et al. is silent as to the presence of any solvent (carrier vehicle). None is present in Example 1. For claims 13, see column 6, lines 38 and on, which teaches combining and reacting as claimed. For claim 14, note that the composition is extruded (column 6, line 66) and the method is solvent free. For claims 15 to 18 and 20, note the various excerpts cited above as they apply. Claims 1 to 4, 6, 7 and 9 to 20 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Anderson et al. 6,610,777. Anderson et al. teach a coating composition that contain a polysiloxane having a reactive functional group (corresponding to claimed component (A)), a material having a reactive functional group (corresponding to claimed component (B)) and various other components that correspond to “a curable silicone elastomer component” such as fillers, catalysts, additional reactants, surface active agents and others. For instance see the structure (III) on the top of column 9 which shows linear siloxanes having terminal Ra groups in which X is preferably a hydroxyl group (see column 10, line 56). As an aside, the Examiner notes that columns 9 and 13 teach that the siloxane can contain other reactive groups meeting claimed X such as amino, vinyl and anhydride but for discussion purposes, at this time, the Examiner will focus on the hydroxyl group (corresponding to the claimed carbinol group due to the R3 linkage). This is the functional group shown in the siloxanes of the working examples. This meets the component (A) as well as the limitations of claims 2 and 3. For component (B), there are various teachings in Anderson et al. that meet this requirement. See for instance column 18, lines 25 to 51, which teach epoxy functional acrylic polymers. Note that paragraph 53 of the instant specification states that acrylic monomers are considered to be olefin monomers in this context. In addition, column 18, line 41, teaches anhydride functional polymers and column 22, lines 22 to 50, teach different anhydride functional polymers. This meets component (B). As examples of claimed component (C) in Anderson et al. the Examiner draws attention to the particles in column 29, lines 25 and on, the surface active agents in column 37 and the adhesion promoters in column 40, lines 6 and on, among other teachings. In this manner each of claims 1 to 3 are anticipated by Anderson et al. For claim 4, see the values of “n” and “n’” as found in column 9, lines 20 to 23, which overlap to such an extent with the claimed range that the skilled artisan would have anticipated a DP of from 50 to 1200. Additionally column 16, line17, teaches an amount of polysiloxane in the composition of less than 30 wt% which anticipates the range of 1 to 30 wt% in claim 4. For claim 6, see column 16, line 42, which teaches an amount of the reactive functional group material of less than 30 wt%, which meets this claimed range. For claim 7, note that silica is taught as a filler in column 31. For claim 9, note that silica meets this requirement and is immiscible with the functionalized polyolefin (material) in Anderson et al. On the other hand see column 35, lines 15 and on, which teach an amount of fillers in a range of less than 75 wt%, which overlaps to such a significant degree with the claimed range as to anticipate it. For claims 10 and 11 see column 23, line 57, which teaches suitable catalysts that meet these claims. For claim 12 note that column 28, line 35, teaches solvent free compositions. For claim 13, note that the polysiloxane and the functionalized material are react-ed in the presence of various additives that meet claimed (C), as noted above. Column 1, line 29, specifically refers to this as a cured coating. For claims 14 and 17, again see column 28 which refers to solvent (carrier) free conditions. Also note column 28 which teaches catalysts. For claims 16 to 20 see column 23, line 57 and on, which teaches the addition of a photo initiator. Again, note that this composition is cured in its final product. Conclusion Applicant's amendment necessitated the new ground(s) of rejection presented in this Office action. Accordingly, THIS ACTION IS MADE FINAL. See MPEP § 706.07(a). Applicant is reminded of the extension of time policy as set forth in 37 CFR 1.136(a). A shortened statutory period for reply to this final action is set to expire THREE MONTHS from the mailing date of this action. In the event a first reply is filed within TWO MONTHS of the mailing date of this final action and the advisory action is not mailed until after the end of the THREE-MONTH shortened statutory period, then the shortened statutory period will expire on the date the advisory action is mailed, and any nonprovisional extension fee (37 CFR 1.17(a)) pursuant to 37 CFR 1.136(a) will be calculated from the mailing date of the advisory action. In no event, however, will the statutory period for reply expire later than SIX MONTHS from the mailing date of this final action. Any inquiry concerning this communication or earlier communications from the examiner should be directed to MARGARET MOORE whose telephone number is (571)272-1090. The examiner can normally be reached on Monday to Friday, 10 am to 5 pm. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Heidi Kelly, can be reached at 571-270-1831. Information regarding the status of published or unpublished applications may be obtained from Patent Center. Unpublished application information in Patent Center is available to registered users. To file and manage patent submissions in Patent Center, visit: https://patentcenter.uspto.gov. Visit https://www.uspto.gov/patents/apply/patent-center for more information and https://www.uspto.gov/patents/docx for information about filing in DOCX format. For additional questions, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. Mgm 7/14/26 /MARGARET G MOORE/Primary Examiner, Art Unit 1765
Read full office action

Prosecution Timeline

Aug 08, 2023
Application Filed
Mar 06, 2026
Non-Final Rejection mailed — §102
Jun 02, 2026
Response Filed
Jul 17, 2026
Final Rejection mailed — §102 (current)

Precedent Cases

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Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

3-4
Expected OA Rounds
68%
Grant Probability
83%
With Interview (+15.0%)
2y 10m (~0m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 1323 resolved cases by this examiner. Grant probability derived from career allowance rate.

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