Prosecution Insights
Last updated: July 17, 2026
Application No. 18/277,956

PYRIDONE COMPOUNDS AND METHODS OF USE

Non-Final OA §112
Filed
Aug 18, 2023
Priority
Feb 19, 2021 — provisional 63/151,334 +2 more
Examiner
WARD, PAUL V
Art Unit
1622
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Exelixis Inc.
OA Round
1 (Non-Final)
83%
Grant Probability
Favorable
1-2
OA Rounds
0m
Est. Remaining
72%
With Interview

Examiner Intelligence

Grants 83% — above average
83%
Career Allowance Rate
1408 granted / 1692 resolved
+23.2% vs TC avg
Minimal -12% lift
Without
With
+-11.5%
Interview Lift
resolved cases with interview
Typical timeline
2y 4m
Avg Prosecution
36 currently pending
Career history
1716
Total Applications
across all art units

Statute-Specific Performance

§101
0.7%
-39.3% vs TC avg
§103
29.6%
-10.4% vs TC avg
§102
8.5%
-31.5% vs TC avg
§112
42.9%
+2.9% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1692 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 STATUS OF THE CLAIMS: Claims 1-2, 4, 8-9, 11, 13, 17, 19, 23, 26-29, 32, 35, 37-38, 40, 42, and 44 are pending in this application. Election/Restrictions Applicant’s election without traverse of species in the reply filed on January 13, 2026 is acknowledged. All claims were examined in its entirety. Claim Rejections - 35 USC § 112, second paragraph The following is a quotation of the second paragraph of 35 U.S.C. 112: 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. Claims 1-2, 4, 8-9, 11, 13, 17, 19, 23, 26-29, 32, 35, 37-38, 40, 42, and 44 (including claims dependent thereon are claims that relate back to independent or dependent claims) rejected under 35 U.S.C. 112, second paragraph, as being indefinite for failing to particularly point out and distinctly claim the subject matter which applicant regards as the invention. Claims 1-2, 4, 8-9, 11, 13, 17, 19, 23, and 26-29 recite heteroaryl, heterocyclic, heteroaromatic and/or aryl, etc., and aromatic. The terms are indefinite since the specification does not define the ring size, heteroatom, number and nature of substituents, and the exact point of contact with the atom(s) for the substituents. Correction is required. Claim Rejections - 35 USC § 112, first paragraph 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. The following is a quotation of the first paragraph of pre-AIA 35 U.S.C. 112: 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 of carrying out his invention. Claims 1-2, 4, 8-9, 11, 13, 17, 19, 23, 26-29, 32, 35, 37-38, 40, 42, and 44 are (including claims dependent thereon and claims that relate back to or refer to independent or dependent claims) are rejected under 35 U.S.C. 112, first paragraph, because the specification, while being enabling for some of the X1-X6, Z1-Z5 and various R groups listed within the specification of the current application, does not reasonably provide enablement for all of the X1-X6, Z1-Z 5 and various R groups listed within the application. 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. The test of enablement is whether one skilled in the art could make and use the claimed invention from the disclosures in the application coupled with information known in the art without undue experimentation. (United States v. Teletronics Inc., 8 USPQ2d 1217 (Fed. Cir. 1988)). Whether undue experimentation is needed is not based on a single factor, but rather a conclusion reached by weighing many factors (See Ex parte Forman 230 USPX 546 (BD. Pat. App. & Inter. 1986) and In re Wands, 8 USPQ2d 1400 (Fed. Cir. 1988). 1. Amount of guidance provided by Applicant. While the Applicant has demonstrated within the application a select number of the heterocyclic compounds, the generic claims according to Formula I (i.e., X1-X6, Z1-Z5 G and various R groups) are massive, and only a small fraction of these compounds are disclosed, discussed, and their synthesis shown. In the claims and specification, applicants claim the following compound according to Formula I: PNG media_image1.png 254 348 media_image1.png Greyscale wherein the various variables for heterocyclic core, which includes for N, C, X1-X6, Z1-Z5 and various R groups groups that are aryl, heteroaryl, heterocyclic, heterocyclyl, arylene, heteroalkene and etc. groups. However, the specification fails to teach all of these compounds, nor does the specification define the ring size, heteroatom, number and nature of substituents, and/or the exact point of contact with the atom(s) for the substituents. 2. Unpredictability in the art. It is well established that “the scope of enablement varies inversely with the degree of unpredictability of the factors involved”, and physiological activity is generally considered to be an unpredictable factor. (USPQ 18, 24 (CCPA 1970). See In re Fisher, 427 F.2d 833, 839, 166. 3. Number of working examples. Applicants have provided some working examples of the compounds (i.e., various variables for heterocyclic core, which includes G, X1-X6, Z1-Z5 and various R groups that are aryl, heteroaryl, heterocyclic, heterocyclyl, aryl, heteroalkene and etc. groups defined). However, these examples only read on a minute portion of the massive claims according to general Formula I in the present application. 4. Scope of the claims. The scope, of the claims, involves a plethora of compounds of general formula I: PNG media_image2.png 254 354 media_image2.png Greyscale , wherein all the variables are defined in the claim. For example, X1-X6, Z1-Z5 and various R groups are defined as the following: PNG media_image3.png 440 696 media_image3.png Greyscale PNG media_image4.png 570 788 media_image4.png Greyscale Thus, the scope of the claims is very broad. 5. Nature of the invention. The nature of this invention relates generally to a bicyclo-heterocycle compound, which plays a role in treating disorders associated in modulating in vivo activity of protein kinase. 6. Level of skill in the art. The artisan using Applicant’s invention would be a chemist with a Ph.D. degree, and having several years of bench experiences. MPEP § 2164.01 (1) states, “A conclusion of lack of enablement means that, based on the evidence regarding each of the above factors, the specification, at the time the application was filed, would not have taught one skilled in the art how to make and/or use the full scope of the claimed invention without undue experimentation. In re Wright, 999 F.2d. 1557, 1562, 27 USPQ2d 1510, 1513 (Fed. Cir. 1993).” Thus, this conclusion is clearly justified here. Therefore, Applicant is not enabled for all of these compounds or compositions. Claim 42 (including claims dependent thereon) is rejected under 35 U.S.C. 112(a) or 35 -U.S.C. 112 (pre-AIA ), first paragraph, as failing to comply with the enablement requirement. The claim(s) contains subject matter which was not described in the specification in such a way as to enable one skilled in the art to which it pertains, or with which it is most nearly connected, to make and/or use the invention. Claim 42 is directed to a method of treating disorders associated in modulating in vivo activity of protein kinase. In light of this, it can be asserted that in spite of the vast expenditure of human and capital resources in recent years, there are no agents that treat all disorders, diseases or syndromes associated in modulating in vivo activity of protein kinase. In re Hokum, 226 USPQ 353 (ComrPats 1985). The determination that “undue experimentation” would have been needed to make and use the claimed invention is not a single, simple factual determination. Rather, it is a conclusion reached by weighing all the above noted factual considerations. In re Wands, 858 F.2d at 737, 8 USPQ2d at 1404. There are many factors to be considered when determining whether there is sufficient evidence to support a determination that a disclosure does not satisfy the enablement requirement and whether any necessary experimentation is “undue”. These factors include, but are not limited to: (A) The breadth of the claims; (B) The nature of the invention; (C) The state of the prior art; (D) The level of one of ordinary skill; (E) The level of predictability in the art; (F) The amount of direction provided by the inventor; (G) The existence of working examples; and (H) The quantity of experimentation needed to make or use the invention based on the content of the disclosure. The breadth of the claims The breadth of the instant claim 42 is seen to encompass a method for treating disorders associated in modulating in vivo activity of protein kinase by administering to a patient in need of such treatment a therapeutically effective amount of a compound of Formula I. Applicant fail to specify a particular disorder. Thus, the claim is extremely broad. The nature of the invention The nature of the invention is the treatment of disorders associated in modulating in vivo activity of protein kinase through the use of the compounds of Formula I thereof. Currently, there are no agents treat these diseases all inclusively. The level of predictability in the art The treatment of these disorders is highly unpredictable. It is well established that “the scope of enablement varies inversely with the degree of unpredictability of the factors involved,” and physiological activity is generally considered to be an unpredictable factor. See In re Fisher, 427 F.2d 833, 839, 166 USPQ 18, 24 (CCPA 1970). The amount of direction provided by the inventor. The applicant has not demonstrated sufficient guidance provided in the form of administration profiles, combination ratios of the active agents or reference to the same in the prior art to provide a skilled artisan with sufficient guidance to practice the instant treatment of disorders claimed. Further, the applicant discloses that an effective amount of the compound will be administered without providing any direction other than that the compounds of the invention have a high therapeutic index and follows this with a definition readily found in a basic pharmacology textbook. It should be noted that the therapeutic index of a drug in humans is almost never known and is only determined through clinical experience. The existence of working examples. There is not seen in the disclosure, sufficient evidence to support Applicant’s claims of treating of these disorders with all of the compounds of Formula I. A conclusion of lack of enablement means that, based on the evidence regarding each of the above factors, the specification, at the time the application was filed, would not have taught one skilled in the art how to make and/or use the full scope of the claimed invention without undue experimentation. In re Wright, 27 USPQ2d 1510 (CAFC). The disclosure does not demonstrate sufficient evidence to support the applicant's claim to the treatment. There are not sufficient working examples or data from references of the prior art to provide a nexus between those examples and a method of treating the disorders with the claimed compound. The level of one of ordinary skill. The level of skill is that of one with a doctoral understanding of these disorder therapeutics. Applicant’s data is not convincing as to make the production and use of pharmaceutical compositions comprising the recited compounds feasible without undue, un-predictable experimentation. The quantity of experimentation. A great deal of experimentation is required for the method of treating disorders associated in modulating in vivo activity of protein kinase. Furthermore, direction, in the form of examples, must be shown to determine what an effective dose may be. The references submitted do not demonstrate this. Therefore, one of ordinary skill in the art would require a significant amount of experimentation in order to determine the effective dosage to treat the multitudes of different types of diseases with the claimed compound individually or in combination with other therapeutic agents. Thus, it can be safely concluded that the instant case fails to provide an enabling disclosure for the treatment of disorders associated in modulating in vivo activity of protein kinase. Conclusion Claims 1-2, 4, 8-9, 11, 13, 17, 19, 23, 26-29, 32, 35, 37-38, 40, 42, and 44 are pending. Claims 1-2, 4, 8-9, 11, 13, 17, 19, 23, 26-29, 32, 35, 37-38, 40, 42, and 44 are rejected. No claims are allowed. Any inquiry concerning this communication or earlier communications from the examiner should be directed to PAUL V WARD whose telephone number is (571)272-2909. The examiner can normally be reached M-F 9am to 5pm. 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 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. /PAUL V WARD/ Primary Examiner, Art Unit 1622
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Prosecution Timeline

Aug 18, 2023
Application Filed
Jun 22, 2026
Non-Final Rejection mailed — §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
83%
Grant Probability
72%
With Interview (-11.5%)
2y 4m (~0m remaining)
Median Time to Grant
Low
PTA Risk
Based on 1692 resolved cases by this examiner. Grant probability derived from career allowance rate.

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