Prosecution Insights
Last updated: April 19, 2026
Application No. 18/572,676

DERIVATIVES OF THE PROTECTIN 10S,17S-DIHDA (PDX) AND USE THEREOF AS ANTIVIRAL, ANTI-INFLAMMATORY, AND ANTI-DIABETIC AGENTS

Non-Final OA §103§112
Filed
Dec 20, 2023
Examiner
SHIAO, REI TSANG
Art Unit
1691
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
UNIVERSITE LAVAL
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

§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 . DETAILED ACTION Priority and Status of Claims 1. This application is a 371 of PCT/CA22/51007 06/23/2022, which claims benefit of the provisional application: 63202822 06/25/2021. 2. Claims 1-10, 32-37, 71-73, 81-82, 85-87 and 93-96 are pending in the application. Claim Rejections - 35 USC § 112 3. 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. 3.1 Claims 1-10, 32-37, 71-73, 81-82, 85-87 and 93-96 are rejected under 35 U.S.C. 112(a) or 35 U.S.C. 112, first paragraph (pre- AIA ), because the specification does not reasonably provide enablement of the instant “protectin, protectin analog, structure isomer” without limitation (i.e., no named compounds). 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 is a method of use using “protectin, protectin analog, structure isomer” without limitation (i.e., no named compounds), see claim 1, 32, 71, 86 and 93. The state of the prior art and the predictability or Iack thereof in the art The state of the prior art is Smith et al. US 2010/0105773 A1, it discloses a number of protectin compounds, see claims 2 and 8-9 in columns 20-21. 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 a number of “protectin, protectin analog, structure isomer” on pages 5-9 of the specification. There is no data present in the instant specification for the “protectin, protectin analog, structure isomer” without limitation (i.e., no named compound). The breadth of the claims The instant breadth of the rejected claims is broader than the disclosure, specifically, the instant “protectin, protectin analog, structure isomer” are without limitation (i.e., no named compound). The quantity or experimentation needed and the Ievel of skill in the art While the level of the skill in the chemical arts is high, it would require undue experimentation of one of ordinary skill in the art to resolve any “protectin, protectin analog, structure isomer” without limitation. There is no guidance or working examples present for constitutional any “protectin, protectin analog, structure isomer”without limitation for the instant invention. Incorporation of the limitation of ““protectin, protectin analog, structure isomer” supported by specification (i.e., claims 10, 37, 73, 87 and 96) into claims 1, 32, 71, 86 and 93 would overcome this rejection. 3.2 Claims 1-10, 32-37, 71-73, 81-82, 85-87 and 93-96 are rejected under 35 U.S.C. 112(a) or 35 U.S.C. 112, first paragraph (pre-AIA ), because the specification does not reasonably provide enablement of “preventing” of viral infection. 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 is intent methods of use using a composition for preventing viral infection, see claims 1, 32, 71, 86 and 93. 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 compounds exhibit the desired pharmacological activities (i.e. what compounds 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. Goldenberg et al. US 4,447,443, it discloses a compound indomethacin is used for treating viral infection and inflammation but not preventing viral infection in a health patient, see claim 5 in column 14. 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 compositions for preventing viral infection. As such, the specification fails to enable the skilled artisan to use the compositions of claims effective for “preventing” viral infection. In addition, there is no established correlation between in vitro or in vivo activity and accomplishing for “preventing” viral infection 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 wherein for “preventing” viral infection is prevented in a host. Hence, one of skill in the art is unable to fully predict possible results from the administration of the instant composition due to the unpredictability of “preventing” viral infection. The “preventing” viral infection is known to have many obstacles that would prevent one of ordinary skill in the art from accepting treating or preventing 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 instant therapy efficacy for treating viral infection, see pages 3-6 of the specification. There are no in vitro or in vivo working examples present for the for “preventing” viral infection by the administration of the instant invention. The breadth of the claims The breadth of the claims is methods of use of the instant compound effective to treat or “preventing” viral infection. The quantity of experimentation needed The quantity of experimentation needed is undue experimentation. One of skill in the art would need to determine how “preventing” viral infection by the administration of the instant invention and would furthermore then have to determine which of the claimed methods of use would provide “preventing” viral infection, 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 preventing of aging of the skin. As a result necessitating one of skill to perform an exhaustive search for which metabolic-related disease s can be treated or prevented by what pharmaceutical compounds 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 compounds in regards to the treatment or preventing 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 deletion the limitation “preventing” from claims 1, 32, 71, 86 and 93 would obviate the rejection. 4. In the event the determination of the status of the application as subject to AIA 35 U.S.C. 102 and 103 (or as subject to pre-AIA 35 U.S.C. 102 and 103) is incorrect, any correction of the statutory basis for the rejection will not be considered a new ground of rejection if the prior art relied upon, and the rationale supporting the rejection, would be the same under either status. Claim Rejections - 35 USC § 103 5. The following is a quotation of 35 U.S.C. 103(a) 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. The factual inquiries set forth in Graham v. John Deere Co., 383 U.S. 1, 148 USPQ 459 (1966), that are applied for establishing a background for determining obviousness under 35 U.S.C. 103(a) are summarized as follows: 1. Determining the scope and contents of the prior art. 2. Ascertaining the differences between the prior art and the claims at issue. 3. Resolving the level of ordinary skill in the pertinent art. 4. Considering objective evidence present in the application indicating obviousness or non-obviousness. This application currently names joint inventors. In considering patentability of the claims under 35 U.S.C. 103(a), the examiner presumes that the subject matter of the various claims was commonly owned at the time any inventions covered therein were made absent any evidence to the contrary. Applicant is advised of the obligation under 37 CFR 1.56 to point out the inventor and invention dates of each claim that was not commonly owned at the time a later invention was made in order for the examiner to consider the applicability of 35 U.S.C. 103(c) and potential 35 U.S.C. 102(f) or (g) prior art under 35 U.S.C. 103(a). Claim 1, 10, 32, 37, 71, 73, 86-87, 93 and 96 are rejected under 35 U.S.C. 103(a) as being obvious over Serhan et al. US 8,273,792 and Marette et al. US 2015/0352069 A1. Applicants claim a method of preventing, delaying the onset or reducing the severity of preventing, or reversing the progression of, or treating a viral infection or disease in a subject, said method comprising administering a protectin, protectin analog, structural isomer, or a pharmaceutically acceptable salt thereof, to the subject, see claim 1. Dependent claim 10 further limits the scope of methods, i.e., a compound PNG media_image1.png 94 392 media_image1.png Greyscale (i.e., protectin DX) is claimed. Applicants claim a method of preventing, delaying the onset or reducing the severity of preventing, or reversing the progression of, or treating insulin resistance or diabetes in a subject, said method comprising administering a protectin, protectin analog, structural isomer, or a pharmaceutically acceptable salt thereof, to the subject, see claim 32. Dependent claim 37 further limits the scope of methods, i.e., a compound PNG media_image1.png 94 392 media_image1.png Greyscale (i.e., protectin DX) is claimed. Applicants claim a method of preventing, delaying the onset or reducing the severity of, preventing or reversing the progression of, or treating an inflammatory disease, disorder, condition, or symptom in a subject, said method comprising administering a protectin, protectin analog, structural isomer, or a pharmaceutically acceptable salt thereof, to the subject, see claim 71. Dependent claim 73 further limits the scope of methods, i.e., a compound PNG media_image1.png 94 392 media_image1.png Greyscale (i.e., protectin DX) is claimed. Applicants claim a method of preventing, delaying the onset or reducing the severity of preventing, or reversing the progression of, or treating an inflammatory disease, disorder, condition, or symptom that is secondary to another condition in a subject, said method comprising administering a protectin, protectin analog, structural isomer, or a pharmaceutically acceptable salt thereof, to the subject, see claim 86. Dependent claim 87 further limits the scope of methods, i.e., a compound PNG media_image1.png 94 392 media_image1.png Greyscale (i.e., protectin DX) is claimed. Applicant claim a method of preventing, delaying the onset or reducing the severity of, preventing, or reversing the progression of, or treating chronic low-level inflammation associated with chronic conditions in a subject, said method comprising administering a protectin, protectin analog, structural isomer, or a pharmaceutically acceptable salt thereof, to the subject, see claim 93. Dependent claim 96 further limits the scope of methods, i.e., a compound PNG media_image1.png 94 392 media_image1.png Greyscale (i.e., protectin DX) is claimed. Determination of the scope and content of the prior art (MPEP §2141.01) Serhan et al. ‘792 disclose method s of use for treating or inflammation or inflammatory disorders (e.g. viral infection) using a compound of formula (II), i.e., PNG media_image2.png 272 472 media_image2.png Greyscale , wherein P1, P2 and R are hydrogen or alkyl, see columns 40-42. Marette et al. ‘069 disclose methods of use for treating diabetes using a compound protectin DX (i.e., PNG media_image1.png 94 392 media_image1.png Greyscale ), see column 10. Determination of the difference between the prior art and the claims (MPEP §2141.02) The difference between instant claims and Serhan et al. ‘792 and Marette et al. ‘069 is that the instant claims are embraced within the scope of Serhan et al. ‘792 and Marette et al. ‘069. Marette et al. ‘069 protectin DX reads on the instant compound PNG media_image1.png 94 392 media_image1.png Greyscale in claims 10, 37, 73, 87 and 96. Finding of prima facie obviousness-rational and motivation (MPEP §2142-2143) One having ordinary skill in the art would find the claims 1, 10, 32, 37, 71, 73, 86-87, 93 and 96 prima facie obvious because one would be motivated to employ the methods of use of Serhan et al. ‘792 and Marette et al. ‘069 to obtain instant invention. The motivation to make the claimed methods of use derived from the known methods of use of Serhan et al. ‘792 and Marette et al. ‘069 would possess similar activity to that which is claimed in the reference. 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 March 09, 2026
Read full office action

Prosecution Timeline

Dec 20, 2023
Application Filed
Mar 09, 2026
Non-Final Rejection — §103, §112 (current)

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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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