Prosecution Insights
Last updated: April 19, 2026
Application No. 17/273,530

FUNCTIONAL POLYSILOXANES

Final Rejection §103§112
Filed
Mar 04, 2021
Examiner
NELSON, MICHAEL B
Art Unit
1787
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Momentive Performance Materials GmbH
OA Round
4 (Final)
21%
Grant Probability
At Risk
5-6
OA Rounds
4y 1m
To Grant
58%
With Interview

Examiner Intelligence

Grants only 21% of cases
21%
Career Allow Rate
114 granted / 537 resolved
-43.8% vs TC avg
Strong +37% interview lift
Without
With
+36.7%
Interview Lift
resolved cases with interview
Typical timeline
4y 1m
Avg Prosecution
85 currently pending
Career history
622
Total Applications
across all art units

Statute-Specific Performance

§103
57.4%
+17.4% vs TC avg
§102
3.7%
-36.3% vs TC avg
§112
32.6%
-7.4% vs TC avg
Black line = Tech Center average estimate • Based on career data from 537 resolved cases

Office Action

§103 §112
DETAILED ACTION Notice of Pre-AIA or AIA Status The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA . In the event the determination of the status of the application as subject to AIA 35 U.S.C. 102 and 103 (or as subject to pre-AIA 35 U.S.C. 102 and 103) is incorrect, any correction of the statutory basis for the rejection will not be considered a new ground of rejection if the prior art relied upon, and the rationale supporting the rejection, would be the same under either status. Claims 1, 2, 4, 6-21 are pending. Applicant’s previous election of Group I, claims 1, 2, 4, 6-7, 21 still applies and claims 8-20 remain withdrawn. Continued Examination Under 37 CFR 1.114 A request for continued examination under 37 CFR 1.114, including the fee set forth in 37 CFR 1.17(e), was filed in this application after final rejection. Since this application is eligible for continued examination under 37 CFR 1.114, and the fee set forth in 37 CFR 1.17(e) has been timely paid, the finality of the previous Office action has been withdrawn pursuant to 37 CFR 1.114. Applicant's submission filed on 09/03/24 has been entered. Claim Rejections - 35 USC § 112(b)/second paragraph The following is a quotation of 35 U.S.C. 112(b): (b) CONCLUSION.—The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the inventor or a joint inventor regards as the invention. The following is a quotation of 35 U.S.C. 112 (pre-AIA ), second paragraph: The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the applicant regards as his invention. Claim(s) 1, 2, 4, 6-7 and 21 is/are rejected under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), second paragraph, as being indefinite for failing to particularly point out and distinctly claim the subject matter which the inventor or a joint inventor, or for pre-AIA the applicant regards as the invention. Claim 1 recites “as the case may be, may” which makes it unclear what “case” is being referred to and how it affects the claim limitation. It would appear remedial to simply remove this phrase (i.e., recite “the dotted lines in the above formulas are a single bond….via a carbon atom, or, represent a direct bond…). The rest of the rejected claims not specifically addressed above are rejected because they depend from one of the claims specifically addressed above and therefore include the same indefiniteness issue(s) via their dependency. Claim Rejections - 35 USC § 103 In the event the determination of the status of the application as subject to AIA 35 U.S.C. 102 and 103 (or as subject to pre-AIA 35 U.S.C. 102 and 103) is incorrect, any correction of the statutory basis for the rejection will not be considered a new ground of rejection if the prior art relied upon, and the rationale supporting the rejection, would be the same under either status. If this application currently names joint inventors: in considering patentability of the claims the examiner presumes that the subject matter of the various claims was commonly owned as of the effective filing date of the claimed invention(s) absent any evidence to the contrary. Applicant is advised of the obligation under 37 CFR 1.56 to point out the inventor and effective filing dates of each claim that was not commonly owned as of the effective filing date of the later invention in order for the examiner to consider the applicability of 35 U.S.C. 102(b)(2)(C) for any potential 35 U.S.C. 102(a)(2) prior art against the later invention. The following is a quotation of 35 U.S.C. 103 which forms the basis for all obviousness rejections set forth in this Office action: A patent for a claimed invention may not be obtained, notwithstanding that the claimed invention is not identically disclosed as set forth in section 102, if the differences between the claimed invention and the prior art are such that the claimed invention as a whole would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains. Patentability shall not be negated by the manner in which the invention was made. The factual inquiries set forth in Graham v. John Deere Co., 383 U.S. 1, 148 USPQ 459 (1966), that are applied for establishing a background for determining obviousness under 35 U.S.C. 103 are summarized as follows: 1. Determining the scope and contents of the prior art. 2. Ascertaining the differences between the prior art and the claims at issue. 3. Resolving the level of ordinary skill in the pertinent art. 4. Considering objective evidence present in the application indicating obviousness or nonobviousness. When something is indicated as being “obvious” this should be taken as shorthand for “prima facie obvious to one having ordinary skill in the art to which the claimed invention pertains before the effective filing date of the invention”. When a range is indicated as overlapping a claimed range, unless otherwise noted, this should be taken as short hand to indicate that the claimed range is obvious in view of the overlapping range in the prior art as set forth in MPEP 2144.05, in the case where the claimed range “overlap or lie inside ranges disclosed by the prior art”, a prima facie case of obviousness exists, In re Wertheim, 541 F.2d 257, 191 USPQ 90 (CCPA 1976); In re Woodruff, 919 F.2d 1575, 16 USPQ2d 1934 (Fed. Cir. 1990). Claim(s) 1, 2, 4, 6-7 and 21 is/are rejected under 35 U.S.C. 103 as being unpatentable over Koellnberger (U.S. 2016/0319079). Regarding claims 1-2, 4, 6-7, and 21, Koellnberger discloses a linear, Si-H bearing polydimethylsiloxane polymer with a chain length overlapping the claimed formula that is hydrosilation reacted with an unsaturated anhydride group (allylsuccinic anhydride), and with the anhydride group being bound to a terminal silicon atom (as in M*) and with the non-terminal silicon atoms independently bearing two non-anhydride organic groups (as in the claimed D unit) and bearing a hydrogen atom and a non-anhydride organic group (as in the claimed DH unit), yielding a linear PDMS polymer with at least one Si-H group and at least one succinic anhydride terminal group, as in claims 1, 2, 4, 6-7 and 21 (see abstract, [0012]-[0021], [0028] explaining that the monovalent carboxylate group depicted in Formula I bearing the R1 group may instead form an anhydride ring, [0035], [0121], exemplifying the reaction of allyl succinic anhydride with a hydrogen functional polydimethylsiloxane, and while the example has only terminal hydrogen atoms, Formula 1 shows that hydrogen atoms also may be included in non-terminal positions, also note that [0121] indicates there may be an excess of Si-H groups to allyl groups, resulting in unreacted hydrogen atoms as claimed). Although this is an intermediate product in Koellnberger, it is still sufficient to render obvious the claimed compound. In light of the overlap between the claimed compound and that disclosed by Koellnberger, it would have been obvious to one of ordinary skill in the art to use a compound that is both disclosed by Koellnberger and is encompassed within the scope of the present claims, and thereby arrive at the claimed invention. Although the reaction of claim 6 is taught by Koellnberger, this is an immaterial product by process limitation. “[E]ven though product-by-process claims are limited by and defined by the process, determination of patentability is based on the product itself. The patentability of a product does not depend on its method of production. If the product in the product-by-process claim is the same as or obvious from a product of the prior art, the claim is unpatentable even though the prior product was made by a different process.” See MPEP 2113. Response to Arguments Applicant’s remarks are moot in light of the new grounds of rejection. Conclusion References cited in any corresponding foreign applications have been considered but would be cumulative to the above. Any inquiry concerning this communication or earlier communications from the examiner should be directed to MICHAEL B NELSON whose direct telephone number is (571)272-9886 and whose direct fax number is (571)273-9886 and whose email address is Michael.Nelson@USPTO.GOV. The examiner can normally be reached on Mon-Sat, 7am - 7pm. Examiner interviews are available via telephone, in-person, and video conferencing using a USPTO supplied web-based collaboration tool. To schedule an interview, applicant is encouraged to use the USPTO Automated Interview Request (AIR) at http://www.uspto.gov/interviewpractice. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Callie Shosho can be reached on 571-272-1123. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300 (faxes sent to this number will take longer to reach the examiner than faxes sent to the direct fax number above). Information regarding the status of an application may be obtained from the Patent Application Information Retrieval (PAIR) system. Status information for published applications may be obtained from either Private PAIR or Public PAIR. Status information for unpublished applications is available through Private PAIR only. For more information about the PAIR system, see http://pair-direct.uspto.gov. Should you have questions on access to the Private PAIR system, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative or access to the automated information system, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. /MICHAEL B NELSON/ Primary Examiner, Art Unit 1787
Read full office action

Prosecution Timeline

Mar 04, 2021
Application Filed
Feb 27, 2024
Non-Final Rejection — §103, §112
Jun 04, 2024
Response Filed
Jun 24, 2024
Final Rejection — §103, §112
Jul 08, 2024
Examiner Interview Summary
Jul 08, 2024
Applicant Interview (Telephonic)
Jul 09, 2024
Response after Non-Final Action
Jul 24, 2024
Response after Non-Final Action
Jul 24, 2024
Applicant Interview (Telephonic)
Sep 03, 2024
Response after Non-Final Action
Nov 07, 2024
Response after Non-Final Action
Nov 19, 2024
Request for Continued Examination
Nov 20, 2024
Response after Non-Final Action
Sep 07, 2025
Non-Final Rejection — §103, §112
Dec 10, 2025
Response Filed
Dec 18, 2025
Final Rejection — §103, §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

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ANTIADHESIVE SUPERHYDROPHOBIC SURFACES
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Patent 12545803
COATING AGENT, RESIN MEMBER, AND PRODUCTION METHOD THEREFOR
2y 5m to grant Granted Feb 10, 2026
Patent 12545804
BIOCIDAL POLYMER FOR LONG-TERM SURFACE PROTECTION
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Patent 12540216
TWO-COMPONENT MOISTURE CURABLE THERMAL INTERFACE MATERIAL FOR THERMAL MANAGEMENT SYSTEMS
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Patent 12534650
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2y 5m to grant Granted Jan 27, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

5-6
Expected OA Rounds
21%
Grant Probability
58%
With Interview (+36.7%)
4y 1m
Median Time to Grant
High
PTA Risk
Based on 537 resolved cases by this examiner. Grant probability derived from career allow rate.

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