Prosecution Insights
Last updated: August 06, 2026
Application No. 18/597,621

HYDROXYUREA TO ENHANCE SPERM CELLS

Final Rejection §112§DP
Filed
Mar 06, 2024
Priority
May 08, 2017 — provisional 62/503,131 +3 more
Examiner
FIEBIG, RUSSELL G
Art Unit
1655
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Meharry Medical College
OA Round
4 (Final)
63%
Grant Probability
Moderate
5-6
OA Rounds
7m
Est. Remaining
88%
With Interview

Examiner Intelligence

Grants 63% of resolved cases
63%
Career Allowance Rate
555 granted / 886 resolved
+2.6% vs TC avg
Strong +25% interview lift
Without
With
+25.4%
Interview Lift
resolved cases with interview
Typical timeline
3y 0m
Avg Prosecution
57 currently pending
Career history
935
Total Applications
across all art units

Statute-Specific Performance

§101
11.7%
-28.3% vs TC avg
§103
41.3%
+1.3% vs TC avg
§102
8.2%
-31.8% vs TC avg
§112
30.2%
-9.8% vs TC avg
Black line = Tech Center average estimate • Based on career data from 886 resolved cases

Office Action

§112 §DP
DETAILED ACTION 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 . The amendment filed 24 June 2026 is acknowledged and has been entered. Status of the Claims Claims 2-4, 9, 13-18 have been cancelled. New claims 19 and 20 have been submitted. Claims 1, 5-8, 10-12 and 19-20 are presented for examination on the merits. 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 1, 5-7 and 19-20 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. Claim 1 is rendered vague and indefinite by the phrase “an effective amount of hydroxyurea for enhancing sperm motility”. The claims have been amended to be directed to a method of both suppressing human immunodeficiency virus (HIV) activity in semen and enhancing sperm motility. Thus it is unclear if the cited phrase is applicable to only enhancing sperm motility or both objectives of the claimed method. Appropriate clarification is required. Double Patenting The nonstatutory double patenting rejection is based on a judicially created doctrine grounded in public policy (a policy reflected in the statute) so as to prevent the unjustified or improper timewise extension of the “right to exclude” granted by a patent and to prevent possible harassment by multiple assignees. A nonstatutory double patenting rejection is appropriate where the conflicting claims are not identical, but at least one examined application claim is not patentably distinct from the reference claim(s) because the examined application claim is either anticipated by, or would have been obvious over, the reference claim(s). See, e.g., In re Berg, 140 F.3d 1428, 46 USPQ2d 1226 (Fed. Cir. 1998); In re Goodman, 11 F.3d 1046, 29 USPQ2d 2010 (Fed. Cir. 1993); In re Longi, 759 F.2d 887, 225 USPQ 645 (Fed. Cir. 1985); In re Van Ornum, 686 F.2d 937, 214 USPQ 761 (CCPA 1982); In re Vogel, 422 F.2d 438, 164 USPQ 619 (CCPA 1970); In re Thorington, 418 F.2d 528, 163 USPQ 644 (CCPA 1969). A timely filed terminal disclaimer in compliance with 37 CFR 1.321(c) or 1.321(d) may be used to overcome an actual or provisional rejection based on nonstatutory double patenting provided the reference application or patent either is shown to be commonly owned with the examined application, or claims an invention made as a result of activities undertaken within the scope of a joint research agreement. See MPEP § 717.02 for applications subject to examination under the first inventor to file provisions of the AIA as explained in MPEP § 2159. See MPEP § 2146 et seq. for applications not subject to examination under the first inventor to file provisions of the AIA . A terminal disclaimer must be signed in compliance with 37 CFR 1.321(b). The filing of a terminal disclaimer by itself is not a complete reply to a nonstatutory double patenting (NSDP) rejection. A complete reply requires that the terminal disclaimer be accompanied by a reply requesting reconsideration of the prior Office action. Even where the NSDP rejection is provisional the reply must be complete. See MPEP § 804, subsection I.B.1. For a reply to a non-final Office action, see 37 CFR 1.111(a). For a reply to final Office action, see 37 CFR 1.113(c). A request for reconsideration while not provided for in 37 CFR 1.113(c) may be filed after final for consideration. See MPEP §§ 706.07(e) and 714.13. The USPTO Internet website contains terminal disclaimer forms which may be used. Please visit www.uspto.gov/patent/patents-forms. The actual filing date of the application in which the form is filed determines what form (e.g., PTO/SB/25, PTO/SB/26, PTO/AIA /25, or PTO/AIA /26) should be used. A web-based eTerminal Disclaimer may be filled out completely online using web-screens. An eTerminal Disclaimer that meets all requirements is auto-processed and approved immediately upon submission. For more information about eTerminal Disclaimers, refer to www.uspto.gov/patents/apply/applying-online/eterminal-disclaimer. Claims 1, 5-8, 10-12 and 19-20 are rejected on the ground of nonstatutory double patenting as being unpatentable over claims 1-10 of U.S. Patent No. 11,926,846. Although the claims at issue are not identical, they are not patentably distinct from each other because each method contains the positively recited step of administering a composition comprising hydroxyurea in amounts from 10 to 25 μg/mL along with human tubal fluid medium to sperm (i.e., spermatozoa or semen). In addition, please note that the instant claims encompass and/or are encompassed by the "846 claims. Applicant's amendment necessitated the new ground(s) of rejection presented in this Office action. Accordingly, THIS ACTION IS MADE FINAL. See MPEP § 706.07(a). Applicant is reminded of the extension of time policy as set forth in 37 CFR 1.136(a). A shortened statutory period for reply to this final action is set to expire THREE MONTHS from the mailing date of this action. In the event a first reply is filed within TWO MONTHS of the mailing date of this final action and the advisory action is not mailed until after the end of the THREE-MONTH shortened statutory period, then the shortened statutory period will expire on the date the advisory action is mailed, and any nonprovisional extension fee (37 CFR 1.17(a)) pursuant to 37 CFR 1.136(a) will be calculated from the mailing date of the advisory action. In no event, however, will the statutory period for reply expire later than SIX MONTHS from the mailing date of this final action. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to RUSSELL G FIEBIG whose telephone number is (571)270-5366. The examiner can normally be reached M-F 8-4. 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, Anand Desai can be reached at 5712720947. 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. /RUSSELL G FIEBIG/ Examiner, Art Unit 1655
Read full office action

Prosecution Timeline

Show 2 earlier events
Aug 26, 2025
Response Filed
Oct 09, 2025
Final Rejection mailed — §112, §DP
Feb 09, 2026
Response after Non-Final Action
Mar 09, 2026
Request for Continued Examination
Mar 18, 2026
Response after Non-Final Action
Mar 24, 2026
Non-Final Rejection mailed — §112, §DP
Jun 24, 2026
Response Filed
Jul 24, 2026
Final Rejection mailed — §112, §DP (current)

Precedent Cases

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COMPOSITIONS COMPRISING AN AMERICAN CRANBERRY EXTRACT AND PHOSPHOLIPIDS
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Patent 12653927
INTESTINAL TISSUE ENHANCED WITH THERAPEUTIC SALTS
5y 8m to grant Granted Jun 16, 2026
Patent 12653220
LOW CALORIE FOOD PREPARATION FOR THE NUTRITION OF CANCER PATIENTS
4y 5m to grant Granted Jun 16, 2026
Patent 12642888
DERMAL FILLERS
3y 6m to grant Granted Jun 02, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

5-6
Expected OA Rounds
63%
Grant Probability
88%
With Interview (+25.4%)
3y 0m (~7m remaining)
Median Time to Grant
High
PTA Risk
Based on 886 resolved cases by this examiner. Grant probability derived from career allowance rate.

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