Prosecution Insights
Last updated: July 17, 2026
Application No. 17/903,138

COVID-19 THERAPEUTICS AND METHODS OF TREATMENT

Non-Final OA §103§112
Filed
Sep 06, 2022
Priority
May 07, 2020 — provisional 63/021,368 +2 more
Examiner
ADLAM, CHANTAL PETA-GAYE
Art Unit
1622
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Board of Supervisors of Louisiana State University and Agricultural and Mechanical College
OA Round
5 (Non-Final)
52%
Grant Probability
Moderate
5-6
OA Rounds
0m
Est. Remaining
78%
With Interview

Examiner Intelligence

Grants 52% of resolved cases
52%
Career Allowance Rate
34 granted / 65 resolved
-7.7% vs TC avg
Strong +26% interview lift
Without
With
+25.6%
Interview Lift
resolved cases with interview
Typical timeline
3y 7m
Avg Prosecution
19 currently pending
Career history
88
Total Applications
across all art units

Statute-Specific Performance

§103
41.3%
+1.3% vs TC avg
§102
3.2%
-36.8% vs TC avg
§112
4.9%
-35.1% vs TC avg
Black line = Tech Center average estimate • Based on career data from 65 resolved cases

Office Action

§103 §112
DETAILED ACTION This action is in response to papers filed on 05/12/2026 and 11/21/2025. Claims 8, 10-19, and 21-28 are pending examination on the merits. Prosecution has been reopened in view of the new prior art discussed below. The time for reply is reset to the mailing of the instant office action. Claims 8, 10-19 and 21-28 are rejected. 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 . Priority Acknowledgment is made of applicant's claim for benefit of provisional application 63/218,318 filed on 07/04/2021 and is also a CIP of 17/315,249 filed on 05/07/2021. Upon reconsideration, the Examiner agrees with Applicant that the earliest priority date of the parent CIP application is that of May 07, 2020. Election/Restrictions Election of Species Requirement Applicant responded to an Election of Species Requirement mailed on October 19, 2023, in a response filed on January 25, 2024. Applicant elected, with traverse, the following species: Species of an ACE2 externalizer: diminazene, drawn to claims 8, 19 and 29. Applicant’s election of species – diminazene as ACE2 externalizer is acknowledged. Accordingly, this Election of Species is made final. Claim Rejection - 35 USC § 112 – Scope of Enablement 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 19 and 21-28 are rejected under 35 U.S.C. 112(a) or 35 U.S.C. 112 (pre-AIA ), first paragraph, because the specification, while being enabling for a method of treating as per claims 8, 10-18, does not reasonably provide enablement for a method of preventing COVID-19 as per claim 19 and 21-28. The specification does not enable any person skilled in the art to which it pertains, or with which it is most nearly connected, to use the invention commensurate in scope with these claims. [In re Sichert, 196 USPQ 209 (CCPA 1977)] To be enabling, the specification of the patent must teach those skilled in the art how to make and use the full scope of the claimed invention without undue experimentation. In re Wright, 999 F.2d 1557, 1561 (Fed. Cir. 1993). Explaining what is meant by “undue experimentation,” the Federal Circuit has stated: The test is not merely quantitative, since a considerable amount of experimentation is permissible, if it is merely routine, or if the specification in question provides a reasonable amount of guidance with respect to the direction in which the experimentation should proceed to enable the determination of how to practice a desired embodiment of the claimed invention. PPG v. Guardian, 75 F.3d 1558, 1564 (Fed. Cir. 1996). The factors that may be considered in determining whether a disclosure would require undue experimentation are set forth by In re Wands, 8 USPQ2d 1400 (CAFC 1988) at 1404 where the court set forth the eight factors to consider when assessing if a disclosure would have required undue experimentation. Citing Ex parte Forman, 230 USPQ 546 (BdApls 1986) at 547 the court recited eight factors: The breadth of the claims; The nature of the invention; The state of the prior art; The level of one of ordinary skill; The level of predictability in the art; The amount of direction provided by the inventor; The existence of working examples; and The quantity of experimentation needed to make or use the invention based on the content of the disclosure. MPEP. § 2164.01(a); In re Wands, 858 F.2d 731, 737, 8 USPQ2d 1400, 1404 (Fed. Cir. 1988); In re Wright, 999 F.2d 1557, 27 USPQ2d 1510 (Fed. Cir. 1993). When the above factors are weighed, it is the examiner’s position that one skilled in the art could not practice the invention without undue experimentation. A discussion of these factors as they relate to the pending claims follows. The above factors, regarding the present invention, are summarized as follows: The breadth of the claims; The claims are thus very broad insofar as they recite a “method of preventing COVID-19 infection” in a patient comprising administering to the patient an ACE2 externalizer, wherein the ACE2 externalizer increases ACE2 surface expression; wherein the ACE2 externalizer is one of diminazene, diminazene aceturate, or a pharmaceutically acceptable salt, solvate, ester, amide, clathrate, stereoisomer, enantiomer, or prodrug thereof. The nature of the invention; The invention relates to “A method of preventing COVID-19 infection in a patient comprising administering to the patient an ACE2 externalizer, wherein the ACE2 externalizer increases ACE2 surface expression; wherein the ACE2 externalizer is one of diminazene, diminazene aceturate, or a pharmaceutically acceptable salt, solvate, ester, amide, clathrate, stereoisomer, enantiomer, or prodrug thereof.”. However, the state of the art recognizes that even monoclonal vaccines are ineffective in preventing COVID-19 exposure for example. The state of the prior art; and (E) The level of predictability in the art; Hammond et al., Therapeutics for COVID-19. Nat. Microbiol. 8, 771–786 (2023) demonstrates that the state of the art is such that no non-immunological therapy is known to be effective in preventing, for example, the exposure of COVID-19 (Applicant’s Specification at para. [0044]. Hammond teaches that even with monoclonal antibodies that target the spike protein of SARS-CoV-2, and block the attachment of the spike protein to the human ACE2 receptors and inhibit viral entry, that “Although this proved to be an efficacious mechanism in preventing disease progression in this population, the utility of specific monoclonal antibodies was limited by the emergence of variants with a mutation of the spike protein that rendered this class of drugs ineffective. Thus, new monoclonal antibodies would be needed once a new variant of concern becomes the predominant strain.” Hammond at page 779. This suggests that the mere prevention of exposure to COVID-19 is elusive, even with the most effective method of treating COVID-19 to date. Hammond at page 779. Hammond et al., Therapeutics for COVID-19. Nat Microbiol 8, 771–786 (2023) also summarizes in Table 1, COVID-19 therapeutics that have been FDA approved or authorized. Hammond teaches that although popular antibacterial Azithromycin showed in vitro antiviral activity, possibly limiting viral replication, and hydroxychloroquine also demonstrated antiviral activity against SARS-CoV-2 in vitro by blocking viral entry; and when combined in vitro, they were observed to have a synergistic effect on SARS-CoV-2 infection; hydroxychloroquine and azithromycin were not effective in clinical trials and are not recommended for the treatment or prevention of COVID-19 by the National Institutes of Health (NIH) Treatment Guidelines Panel (c.f., page 772, Treatment early in the pandemic). As discussed by Hammond on page 772, “These combinations were routinely used early in the pandemic. With later data showing that these regimens yield no clinical benefit, it provides a caution as to how limited in vitro data can be misinterpreted…”. Consequently, the level of predictability is low. Moreover, no clinical nexus between administration of an “ACE2 externalizer” is known in the art, and Applicants have not established any such connection in the prevention of COVID-19. The level of one of ordinary skill; The relative skill of those in the art is high, that of an MD or PHD. That factor is outweighed, however, by the unpredictable nature of the art. The amount of direction provided by the inventor; and (G) The existence of working examples; The amount of guidance or direction needed to enable the invention is inversely related to the degree of predictability in the art. In re Fisher, 839, 166 USPQ 24. Thus, although a single embodiment may provide broad enablement in cases involving predictable factors, such as mechanical or electrical elements, in cases involving unpredictable factors, such as most chemical reactions and physiological activity, more teaching or guidance is required. In re Fisher, 427 F.2d 839, 166 USPQ 24; Ex Parte Hitzeman, 9 USPQ 2d 1823. For example, the Federal Circuit determined that, given the unpredictability of the physiological activity of RNA viruses, a specification requires more than a general description and a single embodiment to provide an enabling disclosure for a method of protecting an organism against RNA viruses. In re Wright, 999 F.2d 1562-63, 27 USPQ2d 1575. In order to practice the full scope of this invention, a skilled artisan would have to conduct several levels of experimentation, starting from the most fundamental proof-of-concept, proceeding through establishing a cellular model, conduct a high-throughput screening for reliable therapeutics, through several levels of animal-model experiments. This amount to development, not invention. It is an undue amount and kind of experimentation. Based on the evidence regarding each of the above factors, a conclusion of lack of enablement means that 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 claim 19 without undue experimentation; {In re Wright, 999 F.2d 1557, 1562, 27 USPQ2d 1510, 1513 (Fed. Cir. 1993)}. The specification fails to provide sufficient support of the broad use of a method of preventing COVID-19 in a patient in need thereof comprising administering to the patient “an ACE2 externalizer”. Moreover, the term “ACE2 externalizer” is not conventional in the art, and is not clearly defined in Applicants’ disclosure. The specification also fails to provide any working examples for prevention by administration of the elected species, diminazene. Applicant’s Specification in para. [0044] recites: The term "prevent," as used herein, includes prophylactic treatment or treatment that prevents one or more symptoms or conditions of a disease, disorder, or conditions described herein (e.g., exposure to the SARS-CoV-2 virus, subsequent infection, and/or COVID-19). Treatment can be initiated, for example, prior to ("pre-exposure prophylaxis") or following ("post-exposure prophylaxis") an event that precedes the onset of the disease, disorder, or conditions. Treatment that includes administration of a compound of the invention, or a pharmaceutical composition thereof, can be acute, short-term, or chronic. The doses administered may be varied during the course of preventive treatment. The sole experimental data concern treatment of cells in culture with diminazene (see, Specification, pp. 12-13). A summary of the description of the figures in the specification on pp.12-13 and discloses: Diminazene aceturate effects on the externalization of ACE2 and the increase of ACE2-mediated binding and signal of VSV virus-expressing COVID- spike protein in target cells. (Fig 1., paragraph [0053]). Confirmed externalization of ACE2 on the cell surface of human brain endothelial cells exposed to diminazene (Fig. 2, paragraph [0054]). The LD50 for diminazene is then determined based on a dose-dependent reduction in the infectivity of cells as disclosed by Fig. 3, paragraph [0055], whereby there is a claimed infectious ratio of 1:100 viruses per cell. Furthermore, in a mathematical assumption, Applicant discloses in paragraph [0056] that “Assuming 100% biological distribution in a 70kg human, 10-4M is a dose of 3.5g and 10-5M is 350mg. The LD50 for Diminazene is ~350mg/kg or 24 grams”, in order to determine a theoretical dose of diminazene. Similarly, Applicant discloses in Fig 5., paragraph [0057] that “… at an infectious ratio of 10:100 viruses per cell…”, “… Assuming 100% biological distribution in a 70kg human, 10-4M is a dose of 3.5g and 10-5M is 350mg. The LD50 for Diminazene is ~350mg/kg or 24 grams”. The final figure, Fig. 6 is described as showing “the appearance of ACE2 expressing cell monolayers at an infectious ratio of 5:100 viruses per cell, and that “This is equivalent to a high dose of 515mg/kg (1mM) to the lowest dose of 5.15mg/kg”, without any further details. Figures 3-5, in particular, disclose experiments related to the observation of luminescence, over a total area, by cells that are treated with the claimed diminazene over time. This increase in luminescence, according to Applicant’s specification, is due to the administration of the claimed diminazene compound and its ability to force the externalization of ACE2 protein; wherein said ACE2 protein “… also happens to be the receptor for COVID-19…” (p.19, paragraph [0076]). Applicant goes on further to state on p. 19, paragraph [0076], that they have discovered that diminazene functions similarly to other angiotensin type 1 receptor antagonists, and ezetimibe and cholesterol synthesis inhibitors, in that it promotes or forces the externalization of ACE2. Applicant then uses prophetic assertions to support the claimed rationale that an increase in the externalization of ACE2, following the administration of diminazene, would be able prevent COVID-19 (p. 19, paragraph [0076]): Maintaining patients on combination therapy with one or more ACE2 externalizers and one or more ACE2 internalization preventors, will promote at least two specific clinical benefits: 1) the beneficial balance of surface ACE2 will be restored, ACE2 being an anti-coagulant, anti-inflammatory and vasorelaxant, effects which are diminished or lost in COVID infection, 2) secondly, this combination of drugs will 'lock out' the SARS-CoV-2 virus against penetration into the cytoplasm of the cell, thereby preventing propagation and infection spread. There is no description of an actual reduction to practice supporting the administration of diminazene, diminazene aceturate, or a pharmaceutically acceptable salt, solvate, ester, amide, clathrate, stereoisomer, enantiomer, or prodrug thereof, according to the claims, to prevent COVID-19 in a patient in need thereof. All statements regarding treatment variables, from the composition of formulations to the route of administration and suitable dosage amounts and frequency lack specificity. The therapeutic dosage disclosed for treatment varies over several orders of magnitude, and are generic for an “active agent” (c.f., paragraph 101). There is no description of the preparation of the cells, or results data showing the prevention of COVID-19. The specification also does not provide any assurance of success in terms of the administration diminazene in preventing COVID-19. There is no discussion of the cell type employed and its connection with the actual disease. There is no discussion of an animal model, and no nexus between Applicants’ results and COVID-19 infection is established. In addition, all of the claims are broadly generic as to the active agent -- “ACE2 externalizer” term which lacks a definition in the specification to compensate for the absence of a precise meaning as used in the art. The quantity of experimentation needed to make or use the invention based on the content of the disclosure. Because of the known unpredictability of the art, and in the absence of experimental evidence, no one skilled in the art would accept the assertion that every instantly claimed method could be predictably used for the prevention of COVID-19 inferred by the claims and contemplated by the specification. Accordingly, the instant claims do not comply with the enablement requirement of §112, since to practice the invention claimed in the patent a person of ordinary skill in the art would have to engage in undue experimentation, with no assurance of success. As pointed out by the court in In re Angstadt, 537 F.2d 498 at 504 (CCPA 1976), the key word is “undue”, not “experimentation”. In sum, the enablement prong of 35 U.S.C. §112(a) requires that a patent specification teach a skilled artisan to use – not to make and test – the full scope of the claimed invention without undue experimentation. For a method of preventing (claims 19 and 21-28) COVID-19, the specification provides none of the indicia set forth above in sufficient detail that one skilled in the art can reasonably use the claimed invention without undue experimentation. The Specification is largely theoretical (e.g., “…would be expected to experience relief...”) (see, p. 16, paragraph [0068]), or hypothetical, or allude to experimental results that are neither referenced nor provided. Therefore, the connection between Applicants’ results and COVID-19 infection is at best hypothetical. In view of the Wands factors and In 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 to prevent COVID-19 in a patient in need thereof per the claimed invention, with no assurance of success in preventing COVID-19. Applicant’s Arguments Applicant argues that the Specification is enabling for the prevention of COVID-19 per claims 19 and 21-28 in a patient in Applicant’s Remarks filed 11/21/2025. Applicant argues the mechanism by which they believe prevention occurs in a patient, and according to Applicant, this is by promoting ACE2 externalization on the surface of the cell without activating ACE2 and without the need for direct interference with ACE2-spike interaction. Applicant’s Remarks at page 6. Examiner’s Response Applicant’s arguments have been considered, but are not found to be persuasive. In view of the Wands factors and In 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 to prevent COVID-19 in a patient in need thereof per the Applicant’s claimed invention, with no assurance of success in preventing COVID-19. Applicant fails to demonstrate or show how the method is enabling for the prevention of COVID-19 and instead argues the mechanism of action of the claimed compound. For a method of preventing COVID-19 the specification provides no description of an actual reduction to practice, no showing that the invention is ready for patenting, and no description of distinguishing characteristics of a method of treating COVID. All statements regarding treatment variables, from composition of formulations to route of administration to dosage amounts and frequency lack specificity; they are boilerplate. The therapeutic dosage disclosed for treatment varies over several orders of magnitude, and the treatment cycle varies from a single treatment to the rest of the subject’s life. In addition, all of the claims are broadly generic as to one or both of the active agents -- “ACE2 externalizer” and an “ACE2 internalization preventer,” terms which themselves lack a definition in the specification to compensate for the absence of a precise meaning as used in the art. The specification does not provide information regarding administration of sufficient species of either of these genera to represent the full genus. The specification also fails to provide any working examples for prevention by administration of the elected species, diminazene. Applicant has not demonstrated any method that prevents one or more symptoms or conditions of COVID-19. The claims are not enabled for the prevention of COVID-19. The rejection is maintained. 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. The factual inquiries for establishing a background for determining obviousness under 35 U.S.C. 103 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 nonobviousness. Claims 8, 10-19 and 21-28 are rejected under 35 U.S.C. 103 as being unpatentable over Abassi et al., American Journal of Physiology-Lung Cellular and Molecular Physiology 2020 318:5, L1029-L1030 published online May 4, 2020 (“Abassi”), in view of Rigatto et al., European Journal of Pharmacology, Volume 713, Issues 1-3, 5 August 2013, pages 89-93 (“Rigatto”). Regarding claims 8 and 19, Abassi teaches the same strategy as the claimed invention of treating COVID-19 using an ACE2 activator, particularly Diminazene. For example, on page L1029 Abassi teaches: "In line with such a therapeutic strategy, we alternatively suggest .... using an ACE2 activator (Diminazene) in COVID-19 disease to maintain the positive effects of this enzyme, still hoping to change its configuration and possibly its affinity to SARS-CoV-2. We are aware that the catalytic active site of ACE2 is distant from the SARS binding site, but the effects of MLN-4760 and Diminazene on the affinity of ACE2 to SARS-CoV-2 merit evaluation in our view...". While Abassi does not expressly teach a method of treatment where diminazene, was administered, Rigatto teaches the administration of diminazene aceturate (DIZE) to a subset of rats at 15 mg/kg/day for a period of 21 days. (Abstract). It would have therefore been prima facie obvious to one of ordinary skill in the art, at the time of filing, to treat COVID-19 with DIZE in view of the combined teachings of Abassi and Rigatto. One of ordinary skill in the art would have been motivated to do so, with a reasonable expectation of success because Abassi teaches diminazene for use in the treatment of SARS-COV-2 via ACE2 activation. Rigatto teaches the actual administration of DIZE to a subject. The combined teachings provide one of ordinary skill in the art, the opportunity to treat COVID-19 with the combined approach resulting in the claimed method. Furthermore, it is within the skill of an artisan to routinely optimize and formulate claimed ranges in order to arrive at the claimed invention with reasonable expectation of success. See In re Aller, 220 F.2d 454,456, 105 USPQ 233,235 (CCPA 1955) which states, "where 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." See MPEP § 2144.05. Moreover, as discussed by Applicant in Applicant's Remarks filed 11/21/2025 on page 5, the earliest priority date of the parent CIP application is that of May 07, 2020. Abassi et al., was published online May 4, 2020. Hence, Abassi et al., in this instance qualifies as prior art. Claim 8 is obvious. Regarding claims 10-13 and 21-24, the claims are drawn to a final circulating blood concentration of the ACE2 externalizer, including when 500 mg or less of the claimed compound is administered. It is noted that neither independent claim 8 (treatment) nor independent claim 19 (prevention) require the administration of any particular dose of diminazene, which would presumably be necessary to achieve the recited results. As applied to claims 8 and 19, Abassi in view of Rigatto teachings are discussed above. Rigatto teaches the administration of diminazene aceturate (DIZE) to a subset of rats at 15 mg/kg/day for a period of 21 days. (Abstract). It would have therefore been prima facie obvious, for one of ordinary skill in the art, at the time of filing, to further modify Abassi’s teachings in view of Rigatto teachings, as applied above to claims 8 and 19, in order to optimize and include a dosage of 500 mg or less, and arrive at the claimed invention. One of ordinary skill in the art would have been motivated to optimize the dosage to achieve the desired clinical outcome of treating the COVID-19 infection, and necessarily obtain a final circulating blood concentration between 1µM and 100 µM. Moreover, it is within the skill of an artisan to optimize the dosage amount to obtain formulations with the claimed dosage range that would necessarily yield the recited plasma concentrations. Because optimizing dosage range is routinely practiced in the pharmaceutical arts, a person of ordinary skill in the art would have had a reasonable expectation of success in obtaining formulations of diminazene aceturate with optimal dosage amounts thereof. See In re Aller, 220 F.2d 454,456, 105 USPQ 233,235 (CCPA 1955) which states, "where 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." See MPEP § 2144.05, "II. Optimization of Ranges". Claims 10-13 and claims 21-24 are therefore obvious over Abassi in view of Rigatto. Regarding claims 14-16 and 25-27, the claims are drawn to routine routes and administration schedules of pharmaceutical compositions. As applied to claims 8 and 19, Abassi in view of Rigatto’s teachings are discussed above. As discussed above, Rigatto teaches the administration of diminazene aceturate (DIZE) to a subset of rats at 15 mg/kg/day for a period of 21 days. (Abstract). Rigatto also teaches that the group of rats were treated with DIZE subcutaneously for the duration of the treatment (Rigatto, at page 90, 2.2). One of ordinary skill in the art would have therefore been motivated to administer the ACE2 externalizer at least one time per day, in a form that is routine in the art, such as orally, or intravenously as taught by Rigatto. Furthermore, as it relates to the dosage per kilogram of patient’s body weight, this can be calculated, and would necessarily be obtained by one of ordinary skill in the art upon optimization of the dosage based on the desired therapeutic effects or plasma concentration in the body. Moreover, as disclosed above, it is within the skill of an artisan to routinely optimize and formulate the claimed range in order to arrive at the claimed invention with reasonable expectation of success. See In re Aller, 220 F.2d 454,456, 105 USPQ 233,235 (CCPA 1955) which states, "where 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." See MPEP § 2144.05, "II. Optimization of Ranges". Claims 14-16 and 25-27 are therefore obvious over Abassi in view of Rigatto. Regarding claims 17-18 and 28, the claims define the clinical prerequisites that must be met for one to be considered “in need” of treatment. As applied to claims 8 and 19, Abassi in view of Rigatto’s teachings are discussed above. It would been prima facie, for one of ordinary skill in the art, to incorporate the necessary clinical prerequisites, that must be met by a patient, in order for said patient to be administered the disclosed treatment for COVID-19. One would have been motivated to do so because, Abassi teaches that compounds such as diminazene for example, are known compounds in the art that display promising potential for the treatment of COVID-19, by binding to and are therefore expected to produce some level of therapeutic effect based on this mechanism. Claims 17-18 and 28 are therefore obvious over Abassi in view of Rigatto. Examiner’s Response Upon further consideration and an extended search, the closest prior art is: Abassi et al., American Journal of Physiology-Lung Cellular and Molecular Physiology 2020 318:5, L1029-L1030 (“Abassi”), published online May 4, 2020, in view of Rigatto et al., European Journal of Pharmacology, Volume 713, Issues 1-3, 5 August 2013, pages 89-93 (“Rigatto”). The earliest priority date of the parent CIP application is that of May 07, 2020. Hence, Abassi qualifies as prior art. The subject matter of the claimed invention is not free of the prior art. Claims 8, 10-19 and 21-28 are rejected as being unpatentable over Abassi et al., American Journal of Physiology-Lung Cellular and Molecular Physiology 2020 318:5, L1029-L1030 published online May 4, 2020 (“Abassi”), in view of Rigatto et al., European Journal of Pharmacology, Volume 713, Issues 1-3, 5 August 2013, pages 89-93 (“Rigatto”). Conclusion No claims are allowed. Any inquiry concerning this communication or earlier communications from the examiner should be directed to CHANTAL ADLAM whose telephone number is (571)270-0923. The examiner can normally be reached Monday - Friday 8:00 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, JAMES HENRY ALSTRUM-ACEVEDO can be reached on (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. /C A/ Examiner, Art Unit 1622 May 26, 2026 /JAMES H ALSTRUM-ACEVEDO/Supervisory Patent Examiner, Art Unit 1622
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Prosecution Timeline

Show 4 earlier events
Apr 08, 2025
Response after Non-Final Action
Apr 30, 2025
Request for Continued Examination
May 02, 2025
Response after Non-Final Action
May 21, 2025
Non-Final Rejection mailed — §103, §112
Nov 21, 2025
Response Filed
Mar 12, 2026
Final Rejection mailed — §103, §112
May 12, 2026
Response after Non-Final Action
Jun 01, 2026
Non-Final Rejection mailed — §103, §112 (current)

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Prosecution Projections

5-6
Expected OA Rounds
52%
Grant Probability
78%
With Interview (+25.6%)
3y 7m (~0m remaining)
Median Time to Grant
High
PTA Risk
Based on 65 resolved cases by this examiner. Grant probability derived from career allowance rate.

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