Prosecution Insights
Last updated: April 19, 2026
Application No. 18/775,257

HUMAN IPSC-DERIVED VASCULAR-RELATED AND HEMATOPOETIC CELLS FOR THERAPIES AND TOXICOLOGY/DRUG SCREENINGS

Final Rejection §101§112
Filed
Jul 17, 2024
Examiner
LANKFORD JR, LEON B
Art Unit
1657
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
The United States Department of Health and Human Services
OA Round
2 (Final)
70%
Grant Probability
Favorable
3-4
OA Rounds
3y 12m
To Grant
99%
With Interview

Examiner Intelligence

Grants 70% — above average
70%
Career Allow Rate
496 granted / 714 resolved
+9.5% vs TC avg
Strong +31% interview lift
Without
With
+30.6%
Interview Lift
resolved cases with interview
Typical timeline
3y 12m
Avg Prosecution
34 currently pending
Career history
748
Total Applications
across all art units

Statute-Specific Performance

§101
6.6%
-33.4% vs TC avg
§103
39.4%
-0.6% vs TC avg
§102
16.4%
-23.6% vs TC avg
§112
25.8%
-14.2% vs TC avg
Black line = Tech Center average estimate • Based on career data from 714 resolved cases

Office Action

§101 §112
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 . Claim Objections The numbering of claims is proper now. Claim Rejections - 35 USC § 112 The rejection under 35 U.S.C. 112(b) has been overcome by applicant’s amendment and arguments. Applicant's arguments filed 12/15/25 have been fully considered but they are not persuasive. Applicant has amendment claim 75 (and other corresponding claims) to indicate that the claimed cell is a “modified iPSC-derived” cell. The limitation “modified” without an actual qualifier does not lead to a claim requires the claimed cell to have markedly different characteristics from what occurs in nature. It also not necessary that iPSC-derived cells would necessarily have markedly different characteristics from what occurs in nature particularly where the characteristics claimed are not distinct from the natural cell. Claim Rejections - 35 USC § 101 35 U.S.C. 101 reads as follows: Whoever invents or discovers any new and useful process, machine, manufacture, or composition of matter, or any new and useful improvement thereof, may obtain a patent therefor, subject to the conditions and requirements of this title. The claimed invention is directed to a judicial exception (i.e., a law of nature, a natural phenomenon, or an abstract idea) without significantly more. Claim(s) 75-97 is/are directed to a naturally occurring cell population. The claim(s) does/do not include additional elements that are sufficient to amount to significantly more than the judicial exception. The claims are drawn to a composition of matter. The claims are drawn to a natural phenomenon, namely the occurrence in nature of a human cell population that expresses CD34 and CD31 and can differentiate into at least 4 cell types, e.g. MSC, HSC, smooth muscle & functional endothelial cells, Claim 12 requires CD45. Claim 14 requires vWF and CD144. Claim 17 requires CD90, CD73, and CD105 in the absence of CD31 and CD45. The other dependent claims recite further inherent functional properties of the cells. require The instant specification describes the invention as a cell produced from IPSCs but as IPSCs differentiate into cells that are the same as natural precursors or ultimately differentiated cells, it follows that the instant cells produced at IPSCs are the same as naturally occurring cells and thus the claims are drawn to a judicial exception to patentability. The claims are drawn to the cells per se and thus this judicial exception is not integrated into a practical application. The specification contains no evidence, that the culturing of the cells imparts characteristics markedly different from those cells as they exist and function in nature. As such, there is no evidence that the claimed population has any characteristics (structural, functional, or otherwise) that are different from the naturally occurring cells and molecules. For these reasons, the claimed invention does not appear to have markedly different characteristics from what occurs in nature and is a “product of nature” exception. Accordingly, the claim is directed to an exception. The claimed invention does not include any additional features that could add significantly more to the exception, so the claim does not qualify as eligible subject matter. Concluding the analysis, the claimed invention is drawn to a judicial exception to the statute and must be rejected as ineligible under 35 USC101. Conclusion THIS ACTION IS MADE FINAL. 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. Any inquiry concerning this communication or earlier communications from the examiner should be directed to BLAINE LANKFORD whose telephone number is (571)272-0917. The examiner can normally be reached M-Th 8-6:30. 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, Louise Humphrey can be reached at 571-272-5543. 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. BLAINE LANKFORD Examiner Art Unit 1657 /BLAINE LANKFORD/Primary Examiner, Art Unit 1657
Read full office action

Prosecution Timeline

Jul 17, 2024
Application Filed
Sep 29, 2025
Non-Final Rejection — §101, §112
Dec 15, 2025
Response Filed
Jan 23, 2026
Final Rejection — §101, §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12590133
IL-13/IL-4 SUPERKINES: IMMUNE CELL TARGETING CONSTRUCTS AND METHODS OF USE THEREOF
2y 5m to grant Granted Mar 31, 2026
Patent 12590312
NR4A SUPER-REPRESSORS AND METHODS OF USE THEREOF
2y 5m to grant Granted Mar 31, 2026
Patent 12589117
MESENCHYMAL STEM CELL-DERIVED EXTRACELLULAR VESICLES AND USES THEREOF FOR TREATING AND DIAGNOSING FIBROTIC DISEASES
2y 5m to grant Granted Mar 31, 2026
Patent 12590954
NEURAL STEM CELL-INDUCED DIFFERENTIAL MEDIUM AND INDUCTION DIFFERENTIATION METHOD
2y 5m to grant Granted Mar 31, 2026
Patent 12590951
CULTURE MEDIUM AND CULTURE METHOD FOR PRIMARY CELLS OF INTESTINAL CANCER
2y 5m to grant Granted Mar 31, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

AI Strategy Recommendation

Get an AI-powered prosecution strategy using examiner precedents, rejection analysis, and claim mapping.
Powered by AI — typically takes 5-10 seconds

Prosecution Projections

3-4
Expected OA Rounds
70%
Grant Probability
99%
With Interview (+30.6%)
3y 12m
Median Time to Grant
Moderate
PTA Risk
Based on 714 resolved cases by this examiner. Grant probability derived from career allow rate.

Sign in with your work email

Enter your email to receive a magic link. No password needed.

Personal email addresses (Gmail, Yahoo, etc.) are not accepted.

Free tier: 3 strategy analyses per month