Prosecution Insights
Last updated: July 17, 2026
Application No. 18/310,501

ORAL LIQUID PHARMACEUTICAL COMPOSITIONS OF ISOTRETINOIN

Final Rejection §103§112
Filed
May 01, 2023
Priority
Nov 01, 2020 — IN 202041047657 +1 more
Examiner
CHANDRAKUMAR, NIZAL S
Art Unit
1625
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Idrs Labs Private Limited
OA Round
2 (Final)
73%
Grant Probability
Favorable
3-4
OA Rounds
0m
Est. Remaining
91%
With Interview

Examiner Intelligence

Grants 73% — above average
73%
Career Allowance Rate
1284 granted / 1768 resolved
+12.6% vs TC avg
Strong +18% interview lift
Without
With
+18.3%
Interview Lift
resolved cases with interview
Typical timeline
2y 3m
Avg Prosecution
89 currently pending
Career history
1858
Total Applications
across all art units

Statute-Specific Performance

§101
1.6%
-38.4% vs TC avg
§103
33.5%
-6.5% vs TC avg
§102
6.6%
-33.4% vs TC avg
§112
37.9%
-2.1% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1768 resolved cases

Office Action

§103 §112
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 . Amended claims 1,2, 4, 5, 8, 14, 17, and new claims 32-42 and withdrawn claims 20-23, 26-29 are pending. Claim Rejections - 35 USC § 103 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. Previously presented rejection of claim(s) 1,2, 4, 5, 8, 14, 17, 32-42 rejected under 35 U.S.C. 103 as being unpatentable over Motwani WO2010134047, Vanderbist WO200202417, Rao WO2016016742, Edelson US 20160213757, Edelson US 20110212157, and Chen US6383471 is maintained for reasons of record. Applicants arguments focus on the amendments to claims, % amounts of active and inactive ingredients in the claims. Applicants arguments with respect the now more specifically recited (previously considered) excipients, the claim language ‘at least’ (in the context of what this term means as per definition in the specification) , the pointed out working Examples in the specification are all considered but are not persuasive. Applicant argues that the cited references do not teach the claim limitations as instantly amended. For example, Applicant states that prior art cited do(es) not teach PNG media_image1.png 22 140 media_image1.png Greyscale architecture as limited. Thus, according to Applicant PNG media_image2.png 18 498 media_image2.png Greyscale and so on. The issue here is that the recited components, such as phosphatidylcholine, oleic acid and their inherent solubilizing property are known in the cited art. The rejection is not under 35 USC § 102 Optimizing the amounts of these various components are routine in the art. The new claims include the same limitations with respect to the active and inactive ingredients. The amounts of these limitations fall under the scope of the previously examined claims. Applicant is encouraged to locate these various components in the cited references using word search technique. At Remarks page 10, Applicants points out exemplification which as pointed out contains components with trade mark which at once suggests these as being in the prior art. Note that disclosure in the specification while considered for claim interpretation are not imported into the claims as limitations. The components are selective combination of prior art elements. It would have been obvious to one of ordinary skill in the art at the time the claimed invention was made to combine the instant ingredients for their known benefit since each is well known in the art for their beneficial properties. Again, the invention is a selective combination of the inventions by the prior arts done in a manner obvious to one of ordinary skill in the art. Patent for the combination of known elements wherein their functions remain the same withdraws “what is already known into field of its monopoly and diminishes resources available to skilled men”. Sakraida v. Ag Pro, Inc.189 USPQ 449, 425 US 273, (1976). Also note that it has been held that where the general conditions of a claim are disclosed in the prior art, discovering the optimum or workable ranges involves only routine skill in the art. The differences in concentration or temperature will not support the patentability of subject matter encompassed by the prior art unless there is evidence indicating such concentration or temperature is critical. “[W]here the general conditions of a claim are disclosed in the prior art, it is not inventive to discover the optimum or workable ranges by routine experimentation.” In re Aller, 220 F.2d 454, 456, 105 USPQ 233, 235 (CCPA 1955). Accordingly, the claims do not recite an unobvious distinction over the prior art. Further, a reference is relevant not only for what it expressly teaches, but also for what it would have conveyed to one of ordinary skill in the art. See In re Opprecht, 12 USPQ2d 1235, 1236 (Fed. Cir. 1989); In re Bode, 193 USPQ 12 (CCPA 1976). In light of the foregoing discussion, the Examiner finds that the claimed subject matter as a whole would have been obvious to one of ordinary skill in the art at the time the invention was made, in view of the cited references and the knowledge generally available in the art. Accordingly, the claims are rejected under 35 U.S.C. § 103. The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. US9089534, US8367102 and US6383471. 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. Clams 1,2, 4, 5, 8, 14, 17, 32-42 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. Open-ended ‘comprising’ language, the term ‘at least’ with respect to the amount of specifically recited active and inactive ingredients in ranges render the boundaries of the composition for what protection is sought unclear. For example, adding up % the (all lower limits or all the upper limits) amounts of the mandatory components exceeds 100%. 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 NIZAL S CHANDRAKUMAR whose telephone number is (571)272-6202. The examiner can normally be reached M-F 8-5 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. /NIZAL S CHANDRAKUMAR/Primary Examiner, Art Unit 1625 f
Read full office action

Prosecution Timeline

May 01, 2023
Application Filed
Sep 07, 2023
Response after Non-Final Action
Dec 22, 2025
Non-Final Rejection mailed — §103, §112
Mar 23, 2026
Response Filed
May 12, 2026
Final Rejection mailed — §103, §112 (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
73%
Grant Probability
91%
With Interview (+18.3%)
2y 3m (~0m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 1768 resolved cases by this examiner. Grant probability derived from career allowance rate.

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