Prosecution Insights
Last updated: April 19, 2026
Application No. 17/270,665

NOVEL BISARYLETHER COMPOUNDS

Non-Final OA §112
Filed
Feb 23, 2021
Examiner
WARD, PAUL V
Art Unit
1622
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Xeniopro GmbH
OA Round
3 (Non-Final)
83%
Grant Probability
Favorable
3-4
OA Rounds
2y 7m
To Grant
72%
With Interview

Examiner Intelligence

Grants 83% — above average
83%
Career Allow Rate
1391 granted / 1672 resolved
+23.2% vs TC avg
Minimal -11% lift
Without
With
+-11.0%
Interview Lift
resolved cases with interview
Typical timeline
2y 7m
Avg Prosecution
36 currently pending
Career history
1708
Total Applications
across all art units

Statute-Specific Performance

§101
2.1%
-37.9% vs TC avg
§103
19.1%
-20.9% vs TC avg
§102
19.4%
-20.6% vs TC avg
§112
43.7%
+3.7% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1672 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 . STATUS OF THE CLAIMS: Claims 1,6, 8-11, 14, 23, 27, 28, 30, 32, 36-37 and 39-53 are pending in this application. Claim Objections Claims 1 and 43-53 are objected to because of the following informalities: the claims contain a strikethrough line for the tables (of compounds) in the claims. In order not to confuse the printers for the patent, Examiner suggests crossing out (using an X) through the tables intended to be deleted from the claims, and using a strikethrough line, for example in claim 1, “Table 2” (i.e., use the strikethrough like to strike through “Table 2:”. Appropriate correction is required. Claim Rejections - 35 USC § 112, 2nd paragraph 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. Claim 32 is 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. Regarding claim 32 the phrase “such as disorders of” (i.e., “iv” and in all instances) renders the claim indefinite because it is unclear whether the limitation(s) following the phrase are part of the claimed invention. See MPEP § 2173.05(d). 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. Claim 32 is rejected under 35 U.S.C. 112, first paragraph, as failing to comply with the written description requirement. The claim(s) contains subject matter, which was not described in the specification in such a way as to reasonably convey to one skilled in the relevant art that the inventor(s), at the time the application was filed, had possession of the claimed invention. The claim is directed to a method of treating various disorders, which includes hyperproliferative disorders, cancers, muscular diseases, and immune disorders. In light of this, it can be asserted that in spite of the vast expenditure of human and capital resources in recent years, no one drug has been found which is effective in treating all types of these disorders. 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 claims is seen to encompass methods for treating hyperproliferative disorders, cancers, muscular diseases, and immune disorders by administering to a patient in need of such treatment a therapeutically effective amount of the compound of formula I in claim 1. Applicant failed to exactly and specifically define what types of disorders are treated. Thus, the claims are extremely broad. The nature of the invention The nature of the invention is the treatment of these disorders through the use of the claimed compound and derivatives of formula I. Currently, there are no known agents that 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. 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 disorders’ 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 these disorders. 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 hyperproliferative disorders, cancers, muscular diseases, and immune disorders. Claims 37, 39 and 42 (including claims dependent thereon) are rejected under 35 U.S.C. 112, first paragraph, as failing to comply with the written description requirement. The claim(s) contains subject matter, which was not described in the specification in such a way as to reasonably convey to one skilled in the relevant art that the inventor(s), at the time the application was filed, had possession of the claimed invention. Claims 37, 39 and 42 are directed to a method of treating hyperproliferative disorders and cancer. In light of this, it can be asserted that in spite of the vast expenditure of human and capital resources in recent years, no one drug has been found which is effective in treating all types of these disorders. 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 claims is seen to encompass methods for treating hyperproliferative disorders and cancer by administering to a patient in need of such treatment a therapeutically effective amount of the compound of formula I in claim 1. Applicant failed to exactly and specifically define what types of disorders are treated. Thus, the claims are extremely broad. The nature of the invention The nature of the invention is the treatment of these disorders through the use of the claimed compound and derivatives of formula I. Currently, there are no known agents that 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. 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 disorders’ 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 these disorders. 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 hyperproliferative disorders and cancer. Claim 32 and 39-40 (including claims dependent thereon) are rejected under 35 U.S.C. 112, first paragraph, as failing to comply with the enablement requirement. The claims 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 without undue experimentation. Claims 32 and 39-40 are directed to a method of treating cancer including various types of cancers. The term cancer is interpreted to include any and all forms of cancer. In light of this, it can be asserted that in spite of the vast expenditure of human and capital resources in recent years, no one drug has been found which is effective in treating all types of cancer because it is not a simple disease, nor is it even a single disease, but a complex of a multitude of different entities, each behaving in a different way. In re Hozumi, 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 claims is seen to encompass methods for treating various cancer by administering to a patient in need of such treatment a therapeutically effective amount of a compound of formula I. Thus, the claims are extremely broad. The nature of the invention The nature of the invention is the treatment of cancer through the use of the claimed compound and derivatives thereof. Currently, there are no known agents that treat cancers all inclusively. (See Pinedo et al. pages 1-2). The level of predictability in the art The treatment of cancer is highly unpredictable due to the differing forms of cancerous cells, their location, their potential for metastases, the fact that cancer therapeutics is palliative rather than curative and that cancer treatment readily harms normal tissues. (See McMahon, page 5, col. 2). 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 cancer 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 cancer. 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 of cancer. 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 cancer with the claimed compound. The level of one of ordinary skill. The level of skill is that of one with a doctoral understanding of cancer therapeutics. The quantity of experimentation. A great deal of experimentation is required. In order for there to be a method of treating cancer generally, as claimed by the applicant, it would be necessary to show that a vast range of different types of cancers can be treated that have differing cell types, locations and potentials for metastases. 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 cancer 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 the various cancers listed in the claim. Allowable Subject Matter The following is an examiner’s statement of reasons for allowance: the method and compositions in claims 1, 6, 8-11, 14, 23, 27, 28, 30, 36, 41 and 43-53 were not found to be obvious or anticipated by the prior art. The prior art does not teach or suggest the method and compositions encompassing the compounds substituted in the manner claimed by the Applicant. Therefore, claims 6, 8-11, 14, 23, 27, 28, 30, 36, and 41 are allowed, and claims 1 and 43-53 will be allowed be allowed if amended to obviate the objection for the minor informalities. Conclusion Claims 1,6, 8-11, 14, 23, 27, 28, 30, 32, 36-37 and 39-53 are pending. Claims 32, 37, 39-40 and 42 are rejected. Claims 6, 8-11, 14, 23, 27, 28, 30 and 36 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
Read full office action

Prosecution Timeline

Feb 23, 2021
Application Filed
Nov 06, 2024
Non-Final Rejection — §112
May 08, 2025
Response Filed
Jul 31, 2025
Final Rejection — §112
Oct 02, 2025
Response after Non-Final Action
Dec 15, 2025
Request for Continued Examination
Dec 16, 2025
Response after Non-Final Action
Jan 25, 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

3-4
Expected OA Rounds
83%
Grant Probability
72%
With Interview (-11.0%)
2y 7m
Median Time to Grant
High
PTA Risk
Based on 1672 resolved cases by this examiner. Grant probability derived from career allow rate.

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