Prosecution Insights
Last updated: July 17, 2026
Application No. 18/254,465

A SERIES OF PYRROLE DERIVATIVES AND THEIR PREPARATION METHOD AND THERAPEUTIC USE

Non-Final OA §112
Filed
Nov 30, 2023
Priority
Dec 21, 2020 — CN 202011519683.3 +2 more
Examiner
RAO, PADMAJA S
Art Unit
1627
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Shenzhen Sungening Bio-Medical Co. Ltd.
OA Round
1 (Non-Final)
70%
Grant Probability
Favorable
1-2
OA Rounds
4m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 70% — above average
70%
Career Allowance Rate
98 granted / 141 resolved
+9.5% vs TC avg
Strong +38% interview lift
Without
With
+37.9%
Interview Lift
resolved cases with interview
Typical timeline
3y 0m
Avg Prosecution
46 currently pending
Career history
194
Total Applications
across all art units

Statute-Specific Performance

§101
2.0%
-38.0% vs TC avg
§103
34.8%
-5.2% vs TC avg
§102
9.9%
-30.1% vs TC avg
§112
10.7%
-29.3% vs TC avg
Black line = Tech Center average estimate • Based on career data from 141 resolved cases

Office Action

§112
DETAILED ACTION Notice of Pre-AIA or AIA Status 1) The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA . Status of the Claims and Response to Restriction Requirement 2) Claims 7, 12, 18, 20, 22-23, 29, 31 and 36-39 are pending as of the response and amendments filed 05/15/2026. Claims 1-6, 8-11, 13-17, 19, 21, 24-28, 30 and 32-35 are cancelled. Applicant’s election of group I claims 7, 12, 18, 20, 22-23 and 36-39 without traverse is acknowledged. Claims 29 and 31 are withdrawn from further consideration pursuant to 37 CFR 1.142(b), as being drawn to a nonelected invention, there being no allowable generic or linking claim. Applicant’s election of a species of compound, as those of examples 1, 2, 33, 34 and 38 is acknowledged. Claims 7, 12, 18, 20, 22-23 and 36-39 encompass the elected species. Claims 7, 12, 18, 20, 22-23 and 36-39 have been examined to the extent to which they are readable on the above identified elected species. Because Applicant did not distinctly and specifically point out the supposed errors in the election of species requirement, the election has been treated as an election without traverse (MPEP § 818.01(a)). The elected species was examined and was found to be free of prior art. Therefore, the examiner has extended the search to include the entire genus of compounds of Formula II as in claim 7. The compounds of Formula II are free of prior art. In view of the pending claims, the following rejections are made. Priority 3) This application is a 371 of PCT/CN2021/126634 filed 10/27/2021 and claims foreign priority to CHINA 202110573594.5 filed 05/25/2021 and CHINA 202011519683.3 filed 12/21/2020. It is noted that Applicants have not provided an English translation of the certified copy of the foreign priority applications as required by 35 U.S.C. 119(b)(3), 37 C.F.R 1.55(g)(1)-(4). Without the English translation, one cannot ascertain if the instant invention is supported in the foreign priority applications. Therefore, art prior to the PCT date, but not before the date of the Chinese application may be cited against the claims. See also MPEP § 216 for further details. Information Disclosure Statement 4) The information disclosure statements submitted on 02/09/2026, 07/22/2025 and 07/21/2023 are in compliance with the provisions of 37 CFR 1.97. Accordingly, the information disclosure statements are being considered by the examiner. C.F.R. 1.121 5) Claims 7, 12, 18, 20, 22-23 and 38-39 have not been provided by the proper claim markings that highlight the claim amendments in the claim set dated 05/15/2026 versus the previous preliminary amendment dated 04/03/2026. 37 C.F.R 1.121(c)(2) states “All claims being currently amended in an amendment paper shall be presented in the claim listing, indicate a status of "currently amended," and be submitted with markings to indicate the changes that have been made relative to the immediate prior version of the claims. The text of any added subject matter must be shown by underlining the added text. The text of any deleted matter must be shown by strike-through except that double brackets placed before and after the deleted characters may be used to show deletion of five or fewer consecutive characters. The text of any deleted subject matter must be shown by being placed within double brackets if strike-through cannot be easily perceived. Only claims having the status of "currently amended," or "withdrawn" if also being amended, shall include markings. If a withdrawn claim is currently amended, its status in the claim listing may be identified as "withdrawn— currently amended".” See MPEP 714(II)(C) for further explanation of the amendment format required by 37 C.F.R 1.121. Claim Objections 6) Claims 22 and 36-39 are objected to because of the following informalities: In claim 22, line 1, the preamble should read “The compound of claim 7, …” (the limitation “claim” is missing). In claims 36-39, line 1, the preamble should read “[[According to t]]The compound of claim 7, …” for consistency of claim language. Appropriate correction is required. Claim Rejections - 35 USC § 112 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. 7) Claims 7, 12, 18, 20, 22-23 and 36-37 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 applications subject to pre-AIA 35 U.S.C. 112, the applicant), regards as the invention. Regarding claim 7, the claim recites Formula II with variables J, Y and T, that have not been defined in the claim, therefore causing some ambiguity regarding the scope of the claim. Moreover, claim 7 defines the substituents in R2 and R3 to be the following at the beginning of the claim. PNG media_image1.png 80 703 media_image1.png Greyscale The claim further has the following limitations towards the end of the claim for the substituents in R2 and R3. PNG media_image2.png 105 700 media_image2.png Greyscale A broad range or limitation together with a narrow range or limitation that falls within the broad range or limitation (in the same claim) may be considered indefinite if the resulting claim does not clearly set forth the metes and bounds of the patent protection desired. See MPEP 2173.05 (c). In the present instance, claim 7 recites the broad recitation for the substituents in R2 and R3 at the end of the claim, and the claim also recites a narrower recitation of the substituents in R2 and R3 at the beginning of the claim, which is the narrower statement of the range/limitation. The claim(s) are considered indefinite because there is a question or doubt as to whether the feature introduced by such narrower language is (a) merely exemplary of the remainder of the claim, and therefore not required, or (b) a required feature of the claims. Therefore, the metes and bounds of claim 7 are indefinite. For the purpose of applying prior art, claim 7 has been interpreted without the variables J, Y and T, and with ring A being PNG media_image3.png 66 89 media_image3.png Greyscale ; with the broader recitation of the substituents in R2 and R3 listed at the end of the claim. Regarding claim 12, the claim recites “The compound of claim 7, wherein the compound is of formula III or formula IV …”. However, claim 12 does not recite a compound of formula III, rendering the scope of the claim indefinite. For the purpose of applying prior art, claim 12 has been interpreted as “The compound of claim 7, wherein the compound is of [[formula III or ]]formula IV …”. Claims 12, 18, 20, 22-23 and 36-37 are similarly rejected because they depend from the rejected base claim and do not remedy the indefiniteness. Claim Rejections - 35 USC § 112 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. 8) Claims 23 and 36 are 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 23 depends from claim 7 and recites “The compound of claim 7, wherein R6 is hydrogen, or fluorine-substituted or non-substituted C1 to C4 alkyl”. However, claim 7 also recites R6 as hydrogen, or fluorine-substituted or non-substituted C1 to C4 alkyl. Claim 23 does not further limit the scope of claim 7, which is improper. Claim 36 depends from claim 7 and recites “The compound of claim 7 (see claim interpretation in “Claim Objection” section above), wherein each occurrence of R7 is independently hydrogen, halogen, … -N(CH3)2, -N(CH2CH3)2), … PNG media_image4.png 39 117 media_image4.png Greyscale …”. However, claim 7 does not support R7 being -N(CH3)2, -N(CH2CH3)2) and PNG media_image4.png 39 117 media_image4.png Greyscale . This broadens the scope of the claim 36, which is improper. 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. Allowable Subject Matter 9) The compounds of Formula II as in claim 7 are free of prior art. Except for the claim objections and 35 U.S.C. § 112(b) and 35 U.S.C. § 112(d) rejections above, all claims would be allowable. The following is a statement of reasons for the indication of allowable subject matter: The closest prior art of record is Law et al. (US 2020/0338072 A1, 29 October 2020, hereinafter Law, in the IDS) and Xie et al. (US 2022/0340565 A1, PCT filing date of 02 December 2020, hereinafter Xie) (Xie qualifies as 35 U.S.C. 102(a)(2) prior art). Law teaches the use of olorofim, 2-(1,5-dimethyl-3-phenyl-1H-pyrrol-2-yl)-N-(4-(4-(5-fluoropyrimidin-2-yl)piperazin-1-yl)phenyl)-2-oxoacetamide in the prevention and treatment of a fungal infection caused by a Coccidioides species (Abstract; Para. [0001]). PNG media_image5.png 275 317 media_image5.png Greyscale Olorofim of Law falls within the scope of Formula II of instant claim 7, wherein R2 is C1 alkyl (methyl); R3 is C1 alkyl (methyl); R4 is hydrogen; L is a bond; R5 is non-substituted phenyl; R6 is hydrogen; Z1 is CR8, R8 is hydrogen; R24 is hydrogen; Ring B is substituted 6-membered heteroaryl (pyrimidinyl); n2 is 1; R7 is a halogen (fluoro). Olorofim of Law differs from the instant compounds in the absence of a fused tricyclic ring. Xie teaches pyrrole compounds of general formula (1) with variables as defined, for use in the prevention or treatment of diseases related to fungal infection (Abstract; Paras. [0006]-[0015]). PNG media_image6.png 226 323 media_image6.png Greyscale Xie teaches the following exemplary compound, compound 1 (Para. [0023]). PNG media_image7.png 230 371 media_image7.png Greyscale Compound 1 of Xie falls within the scope of Formula II of instant claim 7, wherein R2 is C1 alkyl (methyl); R3 is C1 alkyl (methyl); R4 is hydrogen; L is a bond; R5 is non-substituted phenyl; R6 is hydrogen; Z1 is CR8, R8 is hydrogen; R24 is hydrogen; Ring B is substituted 6-membered heteroaryl (pyrimidinyl); n2 is 1; R7 is a halogen (fluoro). Compound 1 of Xie differs from the instant compounds in the ring A being PNG media_image8.png 70 70 media_image8.png Greyscale versus the instantly claimed PNG media_image9.png 68 87 media_image9.png Greyscale . The novelty of the instant compounds lies in the tricyclic fused ring containing the PNG media_image9.png 68 87 media_image9.png Greyscale as the middle ring, which is not taught or suggested by the prior art. Therefore, the instant compounds are novel and non-obvious various variants of the compounds taught in the prior art. Conclusion Claims 7, 12, 18, 20, 22-23 and 36-37 are rejected. Claim 22 and 36-39 are objected to. No claims are allowed. Any inquiry concerning this communication or earlier communications from the examiner should be directed to PADMAJA S RAO whose telephone number is (571)272-9918. The examiner can normally be reached 9:00-5:30pm EDT. 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, Kortney L Klinkel can be reached on (571) 270-5239. 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. /PADMAJA S RAO/Examiner, Art Unit 1627
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Prosecution Timeline

Nov 30, 2023
Application Filed
Apr 03, 2026
Response after Non-Final Action
Jun 05, 2026
Non-Final Rejection mailed — §112 (current)

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Prosecution Projections

1-2
Expected OA Rounds
70%
Grant Probability
99%
With Interview (+37.9%)
3y 0m (~4m remaining)
Median Time to Grant
Low
PTA Risk
Based on 141 resolved cases by this examiner. Grant probability derived from career allowance rate.

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