Prosecution Insights
Last updated: April 19, 2026
Application No. 18/318,305

TREATING OF NEUROLOGICAL DISORDERS USING EXTRACELLULAR VESICLES RELEASED BY HUMAN INDUCED PLURIPOTENT STEM CELL DERIVED NEURAL STEM CELLS

Non-Final OA §102
Filed
May 16, 2023
Examiner
SMITH, ADAM MICHAEL
Art Unit
1638
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
The Texas A&M University System
OA Round
1 (Non-Final)
Grant Probability
Favorable
1-2
OA Rounds
3y 2m
To Grant

Examiner Intelligence

Grants only 0% of cases
0%
Career Allow Rate
0 granted / 0 resolved
-60.0% vs TC avg
Minimal +0% lift
Without
With
+0.0%
Interview Lift
resolved cases with interview
Typical timeline
3y 2m
Avg Prosecution
15 currently pending
Career history
15
Total Applications
across all art units

Statute-Specific Performance

§101
1.8%
-38.2% vs TC avg
§103
37.5%
-2.5% vs TC avg
§102
25.0%
-15.0% vs TC avg
§112
21.4%
-18.6% vs TC avg
Black line = Tech Center average estimate • Based on career data from 0 resolved cases

Office Action

§102
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 . Election/Restrictions Applicant’s election of Group II (claims 17-20) in the reply filed on12/16/2025 is acknowledged. Because applicant did not distinctly and specifically point out the supposed errors in the restriction requirement, the election has been treated as an election without traverse (MPEP § 818.01(a)). Claim 1-16 withdrawn from further consideration pursuant to 37 CFR 1.142(b) as being drawn to a nonelected Group I, there being no allowable generic or linking claim. Election was made without traverse in the reply filed on 12/16/2025. Claim Rejections - 35 USC § 102 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 (i.e., changing from AIA to pre-AIA ) 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. 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 17-20 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by AU 2016357303 A1. AU 2016357303 A1 discloses, “The disclosed EVs can be obtained in some embodiments, by culturing neural progenitor (NP) cells that were produced from pluripotent stem cells (e.g. human embryonic stem cells (ESCs) or induced pluripotent stem cells (iPSCs) in cell culture medium” (page 1 paragraph 4). Furthermore, they disclose, “EVs containing 2.7 x 10^10 vesicles/kg in 50-60 ml PBS were thawed” (page 46 paragraph 2). The disclosure describes a composition of extracellular vesicles produced from neural progenitor cells that were created from induced pluripotent stem cells (iPSC) (claim 17). Additionally, the composition is specified to be dissolved in Phosphate Buffered Saline (PBS). This anticipates claim 18 as PBS is the “carrier” and claim 19 PBS is a buffered saline solution. Additionally, the disclosure anticipates claim 20 as the EVs are derived from neural progenitor (NP) cells that were produced from induced pluripotent stem cells (iPSCs) and the composition is specified to contain 2.7 x 10^10 vesicles/kg EVs which can be referred to as a “plurality”. Importantly, the inclusion of instructions for use does not impart patentable weight to the claimed kit. The instructions constitute non-functional descriptive material that merely recites intended use of the components without structurally modifying them. Importantly, the instructions do not create a functional relationship between the components. (MPEP 2111.05 and MPEP 2112.01). Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to Adam M Smith whose telephone number is (571)272-7517. The examiner can normally be reached Monday- Friday 10:30AM-5PM. 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, Tracy Vivlemore can be reached at (571) 272-2914. 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. /Tracy Vivlemore/Supervisory Primary Examiner, Art Unit 1638
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Prosecution Timeline

May 16, 2023
Application Filed
Feb 02, 2026
Non-Final Rejection — §102 (current)

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Prosecution Projections

1-2
Expected OA Rounds
Grant Probability
3y 2m
Median Time to Grant
Low
PTA Risk
Based on 0 resolved cases by this examiner. Grant probability derived from career allow rate.

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