Prosecution Insights
Last updated: April 19, 2026
Application No. 18/289,288

LARGE-CONDUCTANCE POTASSIUM CHANNEL MODULATORS, COMPOSITIONS THEREOF, METHODS OF MANUFACTURING THEREOF, AND METHODS OF USE THEREOF

Non-Final OA §102§103§112
Filed
Nov 02, 2023
Examiner
ROBINSON, MIKHAIL O'DONNEL
Art Unit
1627
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Enalare Therapeutics Inc.
OA Round
1 (Non-Final)
57%
Grant Probability
Moderate
1-2
OA Rounds
3y 6m
To Grant
99%
With Interview

Examiner Intelligence

Grants 57% of resolved cases
57%
Career Allow Rate
59 granted / 103 resolved
-2.7% vs TC avg
Strong +48% interview lift
Without
With
+47.7%
Interview Lift
resolved cases with interview
Typical timeline
3y 6m
Avg Prosecution
50 currently pending
Career history
153
Total Applications
across all art units

Statute-Specific Performance

§101
3.8%
-36.2% vs TC avg
§103
41.6%
+1.6% vs TC avg
§102
20.9%
-19.1% vs TC avg
§112
20.3%
-19.7% vs TC avg
Black line = Tech Center average estimate • Based on career data from 103 resolved cases

Office Action

§102 §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 . Claim Rejections - 35 USC § 112 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 6 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 applications subject to pre-AIA 35 U.S.C. 112, the applicant), regards as the invention. Claim 6 recites the limitation " the method of claim 4, wherein the cardiac disorder is" in line 1. There is insufficient antecedent basis for this limitation in the claim. Claim 6 which depends from claim 4 does not recite the disorder to be a cardiac disorder, but instead a neurological disorder. Claim Rejections - 35 USC § 112 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. Claims 2 and 20 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 applications subject to pre-AIA 35 U.S.C. 112, the applicant), regards as the invention. Claims 2 and 20 recites the limitation " wherein at least one substituent selected from the group of R1, R2, R3 and R5, as described with respect to Formula (I), is alkynyl or substituted alkynyl" in lines 1-3. There is insufficient antecedent basis for this limitation in the claim. R5 from claimed invention does not have an embodiment of alkynyl or substituted alkynyl. Therefore, the metes and bounds of the claims is unclear. Claim Rejections - 35 USC § 102 The following is a quotation of the appropriate paragraphs of 35 U.S.C. 102 that form the basis for the rejections under this section made in this Office action: A person shall be entitled to a patent unless – (a)(1) the claimed invention was patented, described in a printed publication, or in public use, on sale, or otherwise available to the public before the effective filing date of the claimed invention. Claims 19 and 21 are rejected under 35 U.S.C. 102 (a)(1) as being anticipated by Mannion et al. (US Patent No. 9162992). Regarding claims 19 and 21, Mannion teaches a method of reducing or minimizing the open channel fraction of potassium maxi-K or BK channel in a subject in need thereof comprising administering an effective amount of Formula (I) PNG media_image1.png 157 187 media_image1.png Greyscale and at least one pharmaceutically acceptable carrier. Of the above compound Mannion teaches PNG media_image2.png 426 321 media_image2.png Greyscale PNG media_image3.png 86 322 media_image3.png Greyscale (relevant to claims 19 and 21) (Pg. 5-6). 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. Claims 1, 3, 7, 10-18 are rejected under 35 U.S.C. 103 as being unpatentable over Mannion et al. (US Patent No. 9162992) in view of Tao et al. Long-term hypoxia increases calcium affinity of BK channels in ovine fetal and adult cerebral artery smooth muscle, Am J Physiol Heart Circ Physiol, January 2015, Pages H707-H722. The teachings of Mannion for the above 102 rejection of claims 19 and 21 is incorporated herein by reference. Mannion teaches a method for the treatment of breathing control diseases or disorders of respiratory depression, dyspnea, hypoxia, chronic obstructive pulmonary disease (COPD) (which requires organ protection and associated with alterations in airway surface liquid and impaired mucociliary clearance) and hypercapnia (relevant to claims 3, 7, 10, 15-17) (Pg. 2) by route of inhalational, topical, oral, buccal, rectal, vaginal, intramuscular, subcutaneous, transdermal, intrathecal or intravenous (relevant to claim 18) (Pg. 3). In terms of claims 11-13, the teachings of Mannion are also obvious to compound modulating the BK at one or both pore gate of the voltage sensing gate, RCK1, RCK2 and BK channel is located at a pre-synaptic site. It is known in the art the mechanism of BK channel as it relates to pore gate of the voltage sensing gate, RCK1, RCK2 and location of the BK channel on pre-synaptic site. Thus reducing or minimizing the open channel fraction of a BK channel as taught by Mannion one would modulate the pore gate, RCK1, RCK2 wherein the BK channel is located at the pre-synaptic site for hypoxia. Mannion fails to teach the composition to treat the breathing control disease or condition which are modulated by BK channels, wherein the BK channel is located at one or both cardiovascular and smooth muscle. Tao teaches large-conductance, calcium and voltage-activated potassium channel (BK) has a central role in the mechanism of oxygen (O2) sensing and its activity has been related to the hypoxic response (relevant to claim 1) (abstract). BK channels are also expressed in the regulation of cardiovascular smooth muscle (relevant to claim 14) (Pg. 2, 1st para.). Therefore, it would have been obvious to someone of ordinary skill in the art at the time of filing to have used the compound taught by Mannion to treat a breathing control disease or condition which are modulated by BK channels, wherein the BK channel is located at one or both cardiovascular and smooth muscle. One would have been motivated to do so from the teachings of Mannion of the above compound to reducing or minimizing the open channel fraction of potassium maxi-K or BK channel as well as treat breathing control diseases or disorders of respiratory depression, dyspnea, hypoxia, chronic obstructive pulmonary disease, with the teachings of Tao on BK channels modulate breathing control diseases of hypoxia. There is a reasonable expectation of treating breathing control disease or condition which are modulated by BK channels by the compounds taught by Mannion. Allowable Subject Matter Claims 2, 4-6 and 8-9 are objected to as being dependent upon a rejected base claim, but would be allowable if rewritten in independent form including all of the limitations of the base claim and any intervening claims. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to MIKHAIL O'DONNEL ROBINSON whose telephone number is (571)270-0777. The examiner can normally be reached Monday-Friday 7:30am-5:30pm. 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, Kortney Klinkel can be reached at 571-270-5239. 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. MIKHAIL O'DONNEL. ROBINSON Examiner Art Unit 1627 /MIKHAIL O'DONNEL ROBINSON/Examiner, Art Unit 1627 /SARAH PIHONAK/Primary Examiner, Art Unit 1627
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Prosecution Timeline

Nov 02, 2023
Application Filed
Jan 28, 2026
Non-Final Rejection — §102, §103, §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
57%
Grant Probability
99%
With Interview (+47.7%)
3y 6m
Median Time to Grant
Low
PTA Risk
Based on 103 resolved cases by this examiner. Grant probability derived from career allow rate.

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