Prosecution Insights
Last updated: July 17, 2026
Application No. 17/759,265

COMPOUNDS, COMPOSITIONS AND METHODS FOR STABILIZING TRANSTHYRETIN AND INHIBITING TRANSTHYRETIN MISFOLDING

Final Rejection §102§DP
Filed
Jul 21, 2022
Priority
Jan 28, 2020 — provisional 62/966,978 +2 more
Examiner
RZECZYCKI, PHILLIP MATTHEW
Art Unit
1625
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Protego Biopharma Inc.
OA Round
2 (Final)
60%
Grant Probability
Moderate
3-4
OA Rounds
0m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 60% of resolved cases
60%
Career Allowance Rate
67 granted / 111 resolved
At TC average
Strong +42% interview lift
Without
With
+42.3%
Interview Lift
resolved cases with interview
Typical timeline
3y 5m
Avg Prosecution
40 currently pending
Career history
164
Total Applications
across all art units

Statute-Specific Performance

§101
0.6%
-39.4% vs TC avg
§103
38.8%
-1.2% vs TC avg
§102
6.0%
-34.0% vs TC avg
§112
20.0%
-20.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 111 resolved cases

Office Action

§102 §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 . Claims 1-3 and 113-119 have undergone amendments. Claims 7-12, 21-25, 35, and 36 have been cancelled. Thus, Claims 1-3, 5, 6, 13, 30, 33, 34, and 113-119, submitted on 15 May 2026, represent all claims currently under consideration. Election/Restrictions A complete search for Claim 1 was performed, with no prior art retrieved (See STN Search, Search Notes). The election of species requirement is hereby withdrawn. A complete search for Claim 114 was performed with prior art retrieved (See STN Search, Search Notes). Thus, Claims 1-3, 5-6, 13, 17-19, 29, 30, 32-34, 40, 42, 44, 46, 50, 52, 54, and 113-119, submitted on 15 May 2026, represent all claims currently under consideration. Response to Amendment The objection to Claim 1 is withdrawn. Applicant has amended Claim 1 to require only one proviso, rendering the objection moot. The objection to Claims 116-119 is withdrawn. Applicant has amended Claim 116 to define TTR as transthyretin. The 35 U.S.C. § 112(b) rejections of Claims 1-3, 5, 6, 13, 30, 33-35, and 114-119 are withdrawn. Applicant has amended Claims 1-3 and 114 to remove the parentheticals. The 35 U.S.C. § 102(a)(2) rejection of Claims 1-3, 5, 6, 13, 30, 33-35, and 113-119 over Prasad is withdrawn. Applicant has amended Claims 1 and 114 to require that R5 is selected from specific heteroaryl groups, with Claim 113 amended to compounds which contain these specific heteroaryl groups at the corresponding R5 position. Prasad does not teach, suggest, or provide motivation for compounds which contain these specific heteroaryl groups at this position. The 35 U.S.C. § 103 rejection of Claims 1-3, 5, 6, 13, 30, 33-35, and 113-119 over Prasad in view of Thornber is withdrawn. As described previously, Applicant has amended the claims to require specific heteroaryl groups at the variable R5 position, which are not taught, suggested, nor is there any motivation provided, by Prasad. The provisional non-statutory patenting rejection of Claims 1-3, 5, 6, 13, 30, 33-35, and 113-119 over claims 1, 142, and 144-149 of co-pending application No. 18/419,081 is maintained as it is not the only rejection remaining. Claim Rejections - 35 USC § 102- NEW GROUNDS OF REJECTION 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 114 is rejected under 35 U.S.C. 102(a)(1) as being anticipated by STN RN 2348087-82-9 (Entered STN: 28 June 2019). STN SRN 234087-82-9 PNG media_image1.png 94 264 media_image1.png Greyscale has Ar1 as phenyl substituted with alkyl, variable X-1- as NH, n as 1, R1-R4 each as H, X2 as bond, and R5 as imidazolyl. Claim 114 is rejected under 35 U.S.C. 102(a)(1) as being anticipated by STN RN 2347882-11-3 (Entered STN: 28 June 2019). STN RN 2347882-11-3 PNG media_image2.png 80 224 media_image2.png Greyscale has Ar1 as furanyl, variable X-1- as NH, R1-R2 each as H, n as 0, X2 as bond, and R5 as 4-pyridinyl. Claim 114 is rejected under 35 U.S.C. 102(a)(1) as being anticipated by STN RN 2347681-15-4 (Entered STN: 28 June 2019). STN RN 2347681-15-4 PNG media_image3.png 93 262 media_image3.png Greyscale Ar1 as pyridinyl, variable X-1- as NCH2CH3, R1-R4 each as H, n as 1, X2 as bond, and R5 as 4-pyridinyl. Claim 114 is rejected under 35 U.S.C. 102(a)(1) as being anticipated by STN RN 2347380-03-2 (Entered STN: 27 June 2019). STN RN 2347380-03-2 PNG media_image4.png 89 267 media_image4.png Greyscale has Ar1 as furanyl, variable X-1- as NH, R1-R4 each as H, n as 2, X2 as bond, and R5 as imidazolyl. Claim 114 is rejected under 35 U.S.C. 102(a)(1) as being anticipated by STN RN 2347161-77-5 (Entered STN: 27 June 2019). STN RN 2347161-77-5 PNG media_image5.png 82 221 media_image5.png Greyscale has Ar1 as thienyl, variable X-1- as NH, R1-R2 each as H, n as 0, X2 as bond, and R5 as 4-pyridinyl. Claim 114 is rejected under 35 U.S.C. 102(a)(1) as being anticipated by STN RN 2346568-39-4 (Entered STN: 26 June 2019). STN RN 2346568-39-4 PNG media_image6.png 111 269 media_image6.png Greyscale has Ar1 as phenyl substituted with OCH3, variable X-1- as NH, R1-R2 each as H, n as 0, X2 as bond, and R5 as 3-pyridinyl. Claim 114 is rejected under 35 U.S.C. 102(a)(1) as being anticipated by STN RN 2345261-16-5 (Entered STN: 25 June 2019). STN RN 2345261-16-5 PNG media_image7.png 76 270 media_image7.png Greyscale has Ar1 as phenyl substituted with Cl, variable X-1- as NH, R1-R2 each as H, n as 0, X2 as bond, and R5 as 4-pyridinyl. Claim 114 is rejected under 35 U.S.C. 102(a)(1) as being anticipated by STN RN 1691557-25-1 (Entered STN: 26 April 2015). STN RN 1691557-25-1 PNG media_image8.png 82 240 media_image8.png Greyscale has Ar1 as pyrimidinyl, variable X-1- as NH, R1-R2 each as H, n as 0, X2 as bond, and R5 as 5-pyrimidinyl. Claim 114 is rejected under 35 U.S.C. 102(a)(1) as being anticipated by STN RN 1497623-28-5 (Entered STN: 18 December 2013). STN RN 1497623-28-5 PNG media_image9.png 94 238 media_image9.png Greyscale has Ar1 as phenyl substituted with fluorine, variable X-1- as NH, R1-R2 each as H, n as 0, X2 as bond, and R5 as oxazolyl. Double Patenting- REJECTIONS MAINTAINED 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 1-3, 5-6, 13, 17-19, 29, 30, 32-34, 40, 42, 44, 46, 50, 52, 54, and 113-119 are provisionally rejected on the ground of nonstatutory double patenting as being unpatentable over claims 1, 142, and 144-149 of copending Application No. 18/419,081 (Amended claims of 3 May 2024) (‘081). Claim 1 of ‘081 is directed to a compound of formula I PNG media_image10.png 204 304 media_image10.png Greyscale wherein A is PNG media_image11.png 181 657 media_image11.png Greyscale ; X1 is O or NR5; X2 is H, halo, heteroaryl, CN, OR6, or NR7R*; n is an integer from 0-3, p is an integer from 0-3; Ar1 is an optionally substituted aryl or heteroaryl; R1-R8 are selected from (i)-(viii): PNG media_image12.png 262 1025 media_image12.png Greyscale PNG media_image13.png 530 1018 media_image13.png Greyscale ; R9 is H, haloalkyl, alkyl, aryl, heteroaryl, aralkyl, or heteroaralkyl (all optionally substituted); and R10 and R11 are H, halogen, alkyl, haloalkyl, cycloalkyl, heterocycloalkyl, alkenyl, cycloalkenyl, heterocycloalkenyl, aryl, heteroaryl, aralkyl, heteroarlkyl (all optionally substituted) or OR9. Claim 142 claims the compound of claim 1 wherein the compound of formula I has the structure PNG media_image14.png 258 768 media_image14.png Greyscale . Claim 144 claims several specific compounds which meet the limitations of the examined application, such as Compound 35 PNG media_image15.png 158 387 media_image15.png Greyscale , Compound 49 PNG media_image16.png 138 398 media_image16.png Greyscale , and compound 54 PNG media_image17.png 158 380 media_image17.png Greyscale . Claim 145 claims a pharmaceutical composition comprising a compound of claim 1 and a pharmaceutically acceptable carrier. Claim 146 claims a method of inhibiting or preventing TTR aggregation and/or amyloid formation in the eye or CNS of a subject comprising administering a compound of Claim 1. Claim 147 claims a method of inhibiting or preventing TTR aggregation and/or amyloid formation in peripheral nerves or cardiac tissue of a subject comprising administering a compound of claim 1. Claim 148 claims a method of treating a subject having peripheral TTR amyloidosis or ocular or cerebral amyloid angiopathy comprising administering a compound of claim 1. Claim 149 claims aa method of treating a subject having familial amyloid polyneuropathy, familial amyloid cardiomyopathy, TTR oculoleptomeningeal amyloidosis or senile systemic amyloidosis comprising administering a compound of Claim 1. Regarding Claim 113, several of the claimed compounds are obvious variations of what is disclosed by ‘081. Compound 89 of the examined application PNG media_image18.png 144 393 media_image18.png Greyscale differs from Compound 35 of ‘081 PNG media_image19.png 138 353 media_image19.png Greyscale by increasing the length of the alkyl chain connecting the heteroaromatic ring system to the ester, and altering the location of the attachment point on the heteroaromatic ring. The artisan would not expect these compounds to have significantly different properties due to the close chemical structure (See MPEP § 2144.09 I). This is a provisional nonstatutory double patenting rejection because the patentably indistinct claims have not in fact been patented. Conclusion Claims 1-3, 5-6, 13, 17-19, 29, 30, 32-34, 40, 42, 44, 46, 50, 52, 54, and 113-119 are rejected. THIS ACTION IS MADE FINAL. 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 PHILLIP MATTHEW RZECZYCKI whose telephone number is (703)756-5326. The examiner can normally be reached Monday Thru Friday 730AM-5PM EST. 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, Andrew Kosar can be reached at 571-272-0913. 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. /P.M.R./Examiner, Art Unit 1625 /JOHN S KENYON/Primary Patent Examiner, Art Unit 1625
Read full office action

Prosecution Timeline

Jul 21, 2022
Application Filed
Jul 21, 2022
Response after Non-Final Action
Nov 18, 2025
Non-Final Rejection mailed — §102, §DP
May 15, 2026
Response Filed
Jun 15, 2026
Final Rejection mailed — §102, §DP (current)

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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
60%
Grant Probability
99%
With Interview (+42.3%)
3y 5m (~0m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 111 resolved cases by this examiner. Grant probability derived from career allowance rate.

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