Prosecution Insights
Last updated: April 19, 2026
Application No. 17/434,029

PROTEIN SECRETION INHIBITORS

Final Rejection §102§112§DP
Filed
Aug 26, 2021
Examiner
CHICKS, ASHLI ARIANA
Art Unit
1626
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Kezar Life Sciences
OA Round
4 (Final)
65%
Grant Probability
Favorable
5-6
OA Rounds
3y 3m
To Grant
99%
With Interview

Examiner Intelligence

Grants 65% — above average
65%
Career Allow Rate
49 granted / 75 resolved
+5.3% vs TC avg
Strong +44% interview lift
Without
With
+43.9%
Interview Lift
resolved cases with interview
Typical timeline
3y 3m
Avg Prosecution
37 currently pending
Career history
112
Total Applications
across all art units

Statute-Specific Performance

§101
2.1%
-37.9% vs TC avg
§103
29.9%
-10.1% vs TC avg
§102
20.4%
-19.6% vs TC avg
§112
23.6%
-16.4% vs TC avg
Black line = Tech Center average estimate • Based on career data from 75 resolved cases

Office Action

§102 §112 §DP
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 . Claim Status Claims 1, 5, 9, 14-21, 28, 31, 44, 47, 178, 182, 188-189 and 203 are pending. Claims 1, 5, 9, 14-21, 28, 31, 44, 182, 188-189 and 203 are rejected. Claims 47 and 178 are objected to. Response to Amendment Applicant’s amendments have overcome the previously presented 35 USC 102 and 112a rejections as well as the 112d rejections of claims 18-20. Claim Rejections - 35 USC § 112(d) The following is a quotation of 35 U.S.C. 112(d): (d) REFERENCE IN DEPENDENT FORMS.—Subject to subsection (e), a claim in dependent form shall contain a reference to a claim previously set forth and then specify a further limitation of the subject matter claimed. A claim in dependent form shall be construed to incorporate by reference all the limitations of the claim to which it refers. The following is a quotation of pre-AIA 35 U.S.C. 112, fourth paragraph: Subject to the following paragraph [i.e., the fifth paragraph of pre-AIA 35 U.S.C. 112], a claim in dependent form shall contain a reference to a claim previously set forth and then specify a further limitation of the subject matter claimed. A claim in dependent form shall be construed to incorporate by reference all the limitations of the claim to which it refers. Claim 17 is rejected under 35 U.S.C. 112(d) or pre-AIA 35 U.S.C. 112, 4th paragraph, as being of improper dependent form for failing to further limit the subject matter of the claim upon which it depends, or for failing to include all the limitations of the claim upon which it depends. Claim 17 recites compounds where L1-B is broader in scope than independent claim 1 which requires that PNG media_image1.png 178 860 media_image1.png Greyscale Or PNG media_image2.png 292 758 media_image2.png Greyscale etc. Instant claim 17 recites the compound of claim 1 wherein PNG media_image3.png 73 705 media_image3.png Greyscale . When L1-B is PNG media_image4.png 59 42 media_image4.png Greyscale , this definition of X allows for rings other than those specified in claim 1. For instance, claim 17 embraces compounds of this type where X is unsubstituted cyclobutyl whereas claim 1 only provides for one of the following: PNG media_image5.png 139 166 media_image5.png Greyscale PNG media_image6.png 118 204 media_image6.png Greyscale PNG media_image7.png 156 394 media_image7.png Greyscale PNG media_image8.png 164 186 media_image8.png Greyscale . Applicant may cancel the claim(s), amend the claim(s) to place the claim(s) in proper dependent form, rewrite the claim(s) in independent form, or present a sufficient showing that the dependent claim(s) complies with the statutory requirements. To overcome this issue the Examiner recommends that Applicant amend claim 17 to recite: The compound or salt of claim 1, wherein PNG media_image3.png 73 705 media_image3.png Greyscale . Claim Rejections - 35 USC § 102 The following is a quotation of the appropriate paragraphs of 35 U.S.C. 102 that form the basis for the rejections under this section made in this Office action: A person shall be entitled to a patent unless – (a)(1) the claimed invention was patented, described in a printed publication, or in public use, on sale, or otherwise available to the public before the effective filing date of the claimed invention. Claim 203 is rejected under 35 U.S.C. 102(a)(1) as being anticipated by CAS Registry No. 2248829-58-3, which entered Registry on November 18th, 2018. CAS Registry No. 2248829-58-3 is drawn to N-(4-Ethyl-5-methyl-2-thiazolyl)-1-(4-pyridinylmethyl)-1H-pyrrole-2-carboxamide, which has the following structure: PNG media_image9.png 200 396 media_image9.png Greyscale . CAS Registry No. 2248829-58-3 is identical to instant compound A82 of claim 203. Claim 203 is rejected under 35 U.S.C. 102(a)(1) as being anticipated by CAS Registry No. 2248870-86-0, which entered Registry on November 18th, 2018. CAS Registry No. 2248870-86-0 is drawn to N-(5-Cyclopropyl-2-thiazolyl)-1-(4-pyridinylmethyl)-1H-pyrrole-2-carboxamide, which has the following structure: PNG media_image10.png 202 406 media_image10.png Greyscale . CAS Registry No. 2248870-86-0 is identical to instant compound A75 of claim 203. Claim 203 is rejected under 35 U.S.C. 102(a)(1) as being anticipated by CAS Registry No. 2248894-89-3, which entered Registry on November 18th, 2018. CAS Registry No. 2248894-89-3 is drawn to N-Methyl-N-(4-methyl-2-thiazolyl)-1-(4-pyridinylmethyl)-1H-pyrrole-2-carboxamide, which has the following structure: PNG media_image11.png 180 374 media_image11.png Greyscale . CAS Registry No. 2248894-89-3 is identical to instant compound A118 of claim 203. Claim 203 is rejected under 35 U.S.C. 102(a)(1) as being anticipated by CAS Registry No. 2248986-96-9, which entered Registry on November 18th, 2018. CAS Registry No. 2248986-96-9is drawn to N-(6-Methyl-2-benzothiazolyl)-1-(4-pyridinylmethyl)-1H-pyrrole-2-carboxamide, which has the following structure: PNG media_image12.png 184 432 media_image12.png Greyscale . CAS Registry No. 2248986-96-9 is identical to instant compound A73 of claim 203. Double Patenting The nonstatutory double patenting rejection is based on a judicially created doctrine grounded in public policy (a policy reflected in the statute) so as to prevent the unjustified or improper timewise extension of the “right to exclude” granted by a patent and to prevent possible harassment by multiple assignees. A nonstatutory double patenting rejection is appropriate where the conflicting claims are not identical, but at least one examined application claim is not patentably distinct from the reference claim(s) because the examined application claim is either anticipated by, or would have been obvious over, the reference claim(s). See, e.g., In re Berg, 140 F.3d 1428, 46 USPQ2d 1226 (Fed. Cir. 1998); In re Goodman, 11 F.3d 1046, 29 USPQ2d 2010 (Fed. Cir. 1993); In re Longi, 759 F.2d 887, 225 USPQ 645 (Fed. Cir. 1985); In re Van Ornum, 686 F.2d 937, 214 USPQ 761 (CCPA 1982); In re Vogel, 422 F.2d 438, 164 USPQ 619 (CCPA 1970); In re Thorington, 418 F.2d 528, 163 USPQ 644 (CCPA 1969). A timely filed terminal disclaimer in compliance with 37 CFR 1.321(c) or 1.321(d) may be used to overcome an actual or provisional rejection based on nonstatutory double patenting provided the reference application or patent either is shown to be commonly owned with the examined application, or claims an invention made as a result of activities undertaken within the scope of a joint research agreement. See MPEP § 717.02 for applications subject to examination under the first inventor to file provisions of the AIA as explained in MPEP § 2159. See MPEP § 2146 et seq. for applications not subject to examination under the first inventor to file provisions of the AIA . A terminal disclaimer must be signed in compliance with 37 CFR 1.321(b). The filing of a terminal disclaimer by itself is not a complete reply to a nonstatutory double patenting (NSDP) rejection. A complete reply requires that the terminal disclaimer be accompanied by a reply requesting reconsideration of the prior Office action. Even where the NSDP rejection is provisional the reply must be complete. See MPEP § 804, subsection I.B.1. For a reply to a non-final Office action, see 37 CFR 1.111(a). For a reply to final Office action, see 37 CFR 1.113(c). A request for reconsideration while not provided for in 37 CFR 1.113(c) may be filed after final for consideration. See MPEP §§ 706.07(e) and 714.13. The USPTO Internet website contains terminal disclaimer forms which may be used. Please visit www.uspto.gov/patent/patents-forms. The actual filing date of the application in which the form is filed determines what form (e.g., PTO/SB/25, PTO/SB/26, PTO/AIA /25, or PTO/AIA /26) should be used. A web-based eTerminal Disclaimer may be filled out completely online using web-screens. An eTerminal Disclaimer that meets all requirements is auto-processed and approved immediately upon submission. For more information about eTerminal Disclaimers, refer to www.uspto.gov/patents/apply/applying-online/eterminal-disclaimer. Claims 1, 5, 9, 14-21, 28, 31, 44, 182, 188-189 and 203 are provisionally rejected on the ground of nonstatutory double patenting as being unpatentable over claims 1, 10-11, 17, 21, 26, 39, 43, 45, 47, 49, 51, 62, 64-68, 72, 76, 80, 88, 97 and 196-197 of co-pending Application No. 18/019,885 (reference application). Although the claims at issue are not identical, they are not patentably distinct from each other because claim 64 discloses the following compound (Table A): PNG media_image13.png 191 342 media_image13.png Greyscale . Compound A52 is embraced by instant Formula (III) where R4 is C1 alkyl, m is 1, L2 is C1 alkylene, R2 is H, L1-B is PNG media_image14.png 139 157 media_image14.png Greyscale and there are 0 instances of G and E (corresponding to instant claims 1, 14-17, 19-21, and 31). Co-pending claim 97 discloses the following compound (Table B): PNG media_image15.png 145 363 media_image15.png Greyscale . Compound B48 is embraced by instant Formula (IIIA) where L1-B is PNG media_image16.png 101 198 media_image16.png Greyscale and there are 2 instances of G, where G is halo and C1 alkyl (corresponding to instant claims 1, 5, 9, 14-18, 19, 28 and 44). Regarding instant claim 203, the co-pending application discloses the following compound in claim 64: PNG media_image17.png 235 341 media_image17.png Greyscale . Compound A21 is analogous to instant compound A275 depicted below: PNG media_image18.png 181 363 media_image18.png Greyscale . Co-pending compound A21 differs from instant compound A275 by the presence of a methyl substituent where the instant compound has a hydrogen. “Structural relationships may provide the requisite motivation or suggestion to modify known compounds to obtain new compounds. For example, a prior art compound may suggest its homologs because homologs often have similar properties and therefore chemists of ordinary skill would ordinarily contemplate making them to try to obtain compounds with improved properties.” In re Deuel 34 USPQ2d 1210 at 1214. Furthermore MPEP 2144.09 (II) states: “Compounds which are […] homologs (…) are generally of sufficiently close structural similarity that there is a presumed expectation that such compounds possess similar properties. In re Wilder, 563 F.2d 457, 195 USPQ 426 (CCPA 1977).” It is well established that the substitution of methyl for hydrogen on a known compound is not a patentable modification absent unexpected or unobvious results. In re Wood, 199 U.S.P.Q. 137 (C.C.P.A. 1978) and In re Lohr, 137 U.S.P.Q. 548, 549 (C.C.P.A. 1963). The motivation to make a substitution of a hydrogen for an alkyl group stems from the fact that a person having ordinary skill in the art would expect that the compounds would have the same utility as the compounds taught by the co-pending application. In the interest of generating additional compounds that have the same utility as the compounds taught by the co-pending application, a person having ordinary skill in the art would seek to make additional compounds that are most closely related to compounds specifically taught by the co-pending application that have been demonstrated to have the desired utility. The replacement of hydrogen for an alkyl group falls under the well-established doctrine of homology, which assumes that homologous compounds are likely to have similar properties. Therefore, the instantly claimed compound which differs by hydrogen/alkyl, over the compound of the co-pending application is unpatentable absent a showing of unexpected results. MPEP 2144.09 (VIII) states “A prima facie case of obviousness based on structural similarity is rebuttable by proof that the claimed compounds possess unexpectedly advantageous or superior properties. In re Papesch, 315 F.2d 381, 137 USPQ 43 (CCPA 1963).” Regarding instant claim 189, the co-pending application teaches a method of treating cancer by administering the co-pending compounds (claims 196 and 197). Instant claim 182 recites a method of inhibiting protein secretion in a cell comprising contacting the cell with the instant compounds in an effective amount. A person of ordinary skill would recognize this as a natural consequence of administering the compound to treat a disease where it would be expected to contact the recited proteins in the biological system. Regarding instant claim 188, with respect to the fact that the claims of the co-pending case are drawn to compounds and compositions while the instant claims are drawn to methods of treating inflammation or an inflammatory disease, Applicant is directed to Sun Pharmaceutical Industries Ltd. v. Eli Lilly and Co. 95 USPQ2d 1797, Geneva Pharmaceuticals, Inc. v. GlaxoSmithKline PLC, 349 F.3d 1373 [68 USPQ2d 1865] (Fed. Cir. 2003), and Pfizer, Inc. v. Teva Pharmaceuticals USA, Inc., 518 F.3d 1353 [86 USPQ2d 1001] (Fed. Cir. 2008) for analogous situations. The instantly claimed utility is disclosed in paragraph [0010] of the co-pending application. This is a provisional nonstatutory double patenting rejection because the patentably indistinct claims have not in fact been patented. Claims 1, 5, 9, 15-19, 21, 28, 31, 44, 182, and 188-189 are provisionally rejected on the ground of nonstatutory double patenting as being unpatentable over claims 1-2, 4, 11, 14-17, 20-21, 23, 28, 32, 34, 38-40, 42, and 49-50 of copending Application No. 18/841,805 (reference application). Although the claims at issue are not identical, they are not patentably distinct from each other because copending claim 38 discloses compounds from Table A or B including the following: PNG media_image19.png 162 430 media_image19.png Greyscale PNG media_image20.png 178 432 media_image20.png Greyscale . Regarding instant claims 1, 5, 9, 15-19, 21, 28, 31, 44, 182, and 188-189 are copending compound B18 is embraced by instant formula (III) where R4 is absent (m is 0), L2 is C1alkylene, R2 is H, L1-B is PNG media_image21.png 116 184 media_image21.png Greyscale , G is N(RN)2, RN is H. Copending compound B22 reads on instant claims 1, 5, 9, 15, 17-18, 20-21, 31, 182, and 188-189 where R4 is F (m is 1), L2 is C1alkylene, R2 is H, L1-B is PNG media_image22.png 122 114 media_image22.png Greyscale , and there are 0 instances of G. Regarding instant claim 182, copending claim 42 recites a method of inhibiting protein secretion in a cell comprising contacting the cell with the copending compound in amount effective to inhibit secretion wherein the protein is PD-1. Regarding instant claims 188-189, copending claims 49-50 disclose methods of treating inflammation and cancer by administering the copending compounds. This is a provisional nonstatutory double patenting rejection because the patentably indistinct claims have not in fact been patented. Allowable Subject Matter Claims 47 and 178 are objected to as being dependent upon a rejected base claim, but would be allowable if rewritten in independent form including all of the limitations of the base claim and any intervening claims. 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 ASHLI A CHICKS whose telephone number is (571)270-0582. The examiner can normally be reached M-Th 7 a.m.- 5 p.m.. 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, James H Alstrum-Acevedo can be reached at (571)272-5548. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. 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 about Patent Center 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. /A.A.C./Examiner, Art Unit 1626 /MATTHEW P COUGHLIN/Primary Examiner, Art Unit 1626
Read full office action

Prosecution Timeline

Aug 26, 2021
Application Filed
May 30, 2024
Non-Final Rejection — §102, §112, §DP
Sep 04, 2024
Response Filed
Nov 13, 2024
Final Rejection — §102, §112, §DP
Feb 18, 2025
Response after Non-Final Action
May 19, 2025
Request for Continued Examination
May 22, 2025
Response after Non-Final Action
Jun 27, 2025
Non-Final Rejection — §102, §112, §DP
Jan 02, 2026
Response Filed
Feb 04, 2026
Final Rejection — §102, §112, §DP (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

5-6
Expected OA Rounds
65%
Grant Probability
99%
With Interview (+43.9%)
3y 3m
Median Time to Grant
High
PTA Risk
Based on 75 resolved cases by this examiner. Grant probability derived from career allow rate.

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