Prosecution Insights
Last updated: April 19, 2026
Application No. 18/287,885

IDH MUTANT INHIBITOR AND USE THEREOF

Non-Final OA §112
Filed
Oct 22, 2023
Examiner
SHIAO, REI TSANG
Art Unit
1691
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Wigen Biomedicine Technology (Shanghai) Co. Ltd.
OA Round
1 (Non-Final)
80%
Grant Probability
Favorable
1-2
OA Rounds
2y 3m
To Grant
45%
With Interview

Examiner Intelligence

Grants 80% — above average
80%
Career Allow Rate
1612 granted / 2019 resolved
+19.8% vs TC avg
Minimal -35% lift
Without
With
+-35.0%
Interview Lift
resolved cases with interview
Typical timeline
2y 3m
Avg Prosecution
53 currently pending
Career history
2072
Total Applications
across all art units

Statute-Specific Performance

§101
0.7%
-39.3% vs TC avg
§103
29.1%
-10.9% vs TC avg
§102
8.1%
-31.9% vs TC avg
§112
29.6%
-10.4% vs TC avg
Black line = Tech Center average estimate • Based on career data from 2019 resolved cases

Office Action

§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 . DETAILED ACTION Priority and Status of Claims 1. This application is a 371 of PCT/CN2022/099018 06/15/2022, which claims benefit of the foreign applications CHINA CN202110661394.5 06/15/2021. 2. Claims 1-6 are pending in the application. Claim Rejections - 35 USC § 112 3. 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. Claims 1-6 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. Claims 1-6 recite the limitation “crystalline form” without X-ray diffraction pattern data, is ambiguous and indefinite, i.e., see line 1 in claims 1-6 respectively. It is noted that a fully X-ray diffraction pattern data is the fingerprint characteristics of crystalline form compound. Incorporation of an X-ray diffraction pattern data into claims 1-6 respectively would obviate the rejection. 4. The following is a quotation of the first paragraph of 35 U.S.C. 112(a): (a) IN GENERAL.—The specification shall contain a written description of the invention, and of the manner and process of making and using it, in such full, clear, concise, and exact terms as to enable any person skilled in the art to which it pertains, or with which it is most nearly connected, to make and use the same, and shall set forth the best mode contemplated by the inventor or joint inventor of carrying out the invention. Claim 6 is rejected under 35 U.S.C. 112(a) or 112 first paragraph (pre-AIA ), because the specification does not reasonably provide enablement of “a related disease mediated by IDH mutant protein” without limitation (i.e., no named disease), see claim 6. The specification does not enable any person skilled in the art to which it pertains, or with which it is most nearly connected, to make the invention commensurate in scope with these claims. ln In re Wands, 8 USPQ2d 1400 (1988), factors to be considered in determining whether a disclosure meets the enablement requirement of 35 U.S.C. 112, first paragraph, have been described. They are: 1. the nature of the invention, 2. the state of the prior art, 3. the predictability or Iack thereof in the art, 4. the amount of direction or guidance present, 5. the presence or absence of working examples, 6. the breadth of the claims, 7. the quantity of experimentation needed, and 8. the level of the skill in the art. In the instant case: The nature of the invention The nature of the invention of claim 6 is drawn to intent methods of use for treating “a related disease mediated by IDH mutant protein” without limitation (i.e., no named disease). The state of the prior art and the predictability or lack thereof in the art The state of the prior art is that the pharmacological art involves screening in vitro and in vivo to determine which compound iloperidone exhibit the desired pharmacological activities (i.e., what compound iloperidone can treat which specific diseases by what mechanism). There is no absolute predictability even in view of the seemingly high Ievel of skill in the art. The existence of these obstacles establishes that the contemporary knowledge in the art would prevent one of ordinary skill in the art from accepting any therapeutic regimen on its face. The prior art is Miwa’s US 2019/ 0055261A1, it discloses a compound of the formula (II)for treating prostate cancer, see columns 2 and 8. The instant claimed invention is highly unpredictable as discussed below: It is noted that the pharmaceutical art is unpredictable, requiring each embodiment to be individually assessed for physiological activity. In re Fisher, 427 F.2d 833,166 USPQ 18 (CCPA 1970) indicates that the more unpredictable an area is, the more specific enablement is necessary in order to satisfy the statute. Applicants are claiming intent methods of use using the instant compound for treating “a related disease mediated by IDH mutant protein” without limitation (i.e., no named disease). As such, the specification fails to enable the skilled artisan to use the instant compound for treating “a related disease mediated by IDH mutant protein” without limitation (i.e., no named disease). In addition, there is no established correlation between in vitro or in vivo activity and accomplishing “a related disease mediated by IDH mutant protein” without limitation (i.e., no named disease), and those skilled in the art would not accept allegations in the instant specification to be reliable predictors of success, and those skilled in the art would not be able to use the instant compounds since there is no description of an actual method “a related disease mediated by IDH mutant protein” without limitation (i.e., no named disease) in a host is treated. Hence, one of skill in the art is unable to fully predict possible results from the administration of the instant compound due to the unpredictability of treating “a related disease mediated by IDH mutant protein” without limitation (i.e., no named disease). The “a related disease mediated by IDH mutant protein” without limitation (i.e., no named disease) is known to have many obstacles that would prevent one of ordinary skill in the art from accepting treating regimen on its face. The amount of direction or guidance present and the presence or absence of working examples The only direction or guidance present in the instant specification is the description of treating a number of disorders or diseases, see pages 26-30 of the specification. There are no in vitro or in vivo working examples present for “a related disease mediated by IDH mutant protein” without limitation (i.e., no named disease) by the administration of the instant invention. The breadth of the claims The breadth of the claims is methods of use of the instant compounds for treating “a related disease mediated by IDH mutant protein” without limitation (i.e., no named disease). The quantity of experimentation needed The quantity of experimentation needed is undue experimentation. One of skill in the art would need to determine how “a related disease mediated by IDH mutant protein” without limitation (i.e., no named disease) would be benefited (i.e., treated) by the administration of the instant invention and would furthermore then have to determine which of the claimed methods of use would provide “a related disease mediated by IDH mutant protein” without limitation (i.e., no named disease), if any. The Ievel of the skill in the art The Ievel of skill in the art is high. However, due to the unpredictability in the pharmaceutical art, it is noted that each embodiment of the invention is required to be individually assessed for physiological activity by successful conclusion'' and ''patent protection is granted in return for an enabling disclosure of an invention, not for vague intimations of general ideas that may or may not be workable''. in vitro and in vivo screening to determine which methods of use exhibit the desired pharmacological activity and which would benefit from this activity. Thus, the specification fails to provide sufficient support of the broad use of the pharmaceutical composition of the instant claims for the various diseases or disorders. As a result necessitating one of skill to perform an exhaustive search for which metabolic-related disease s can be treated by what pharmaceutical compound of the instant claims in order to practice the claimed invention. Thus, factors such as "sufficient working examples", "the level of skill in the art" and "predictability", etc. have been demonstrated to be sufficiently lacking in the instantly claimed methods. In view of the breadth of the claim, the chemical nature of the invention, and the lack of working examples regarding the activity of the claimed compound regards to the treatment of the many diseases, one having ordinary skill in the art would have to undergo an undue amount of experimentation to use the invention commensurate in scope with the claims. Genentech lnc. v. Novo Nordisk A/S (CA FC) 42 USPQ2d 1001, states that “ a patent is not a hunting license. It is not a reward for search, but compensation for its successful conclusion'' and ''patent protection is granted in return for an enabling disclosure of an invention, not for vague intimations of general ideas that may or may not be workable''. Therefore, in view of the Wands factors and ln re Fisher (CCPA 1970) discussed above, to practice the claimed invention herein, a person of skill in the art would have to engage in undue experimentation, with no assurance of success. This rejection can be overcome by incorporation of named disease supported by the specification into claim 6 would obviate the rejection. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to REI TSANG SHIAO whose telephone number is (571)272-0707. The examiner can normally be reached on 8:30 am-5:00 pm. 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, Renee Claytor can be reached on 571-272-8394. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. 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. /REI TSANG SHIAO/ Rei-tsang Shiao, Ph.D.Primary Examiner, Art Unit 1691 January 26, 2026
Read full office action

Prosecution Timeline

Oct 22, 2023
Application Filed
Jan 26, 2026
Non-Final Rejection — §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

1-2
Expected OA Rounds
80%
Grant Probability
45%
With Interview (-35.0%)
2y 3m
Median Time to Grant
Low
PTA Risk
Based on 2019 resolved cases by this examiner. Grant probability derived from career allow rate.

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