Prosecution Insights
Last updated: July 17, 2026
Application No. 17/611,758

Metabolite Delivery for Modulating Metabolic Pathways of Cells

Final Rejection §103
Filed
Nov 16, 2021
Priority
May 16, 2019 — provisional 62/848,682 +2 more
Examiner
PUTTLITZ, KARL J
Art Unit
1646
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
Arizona Board of Regents on Behalf of Arizona State University
OA Round
4 (Final)
69%
Grant Probability
Favorable
5-6
OA Rounds
0m
Est. Remaining
88%
With Interview

Examiner Intelligence

Grants 69% — above average
69%
Career Allowance Rate
982 granted / 1421 resolved
+9.1% vs TC avg
Strong +18% interview lift
Without
With
+18.5%
Interview Lift
resolved cases with interview
Typical timeline
2y 6m
Avg Prosecution
57 currently pending
Career history
1477
Total Applications
across all art units

Statute-Specific Performance

§101
1.0%
-39.0% vs TC avg
§103
42.4%
+2.4% vs TC avg
§102
8.3%
-31.7% vs TC avg
§112
12.5%
-27.5% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1421 resolved cases

Office Action

§103
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 The rejection under section 103 over Ameer is withdrawn in view of Applicant’s amendments limiting the claims to polymers of alpha-ketoglutarate. The rejection under section 112(a) is withdrawn in view of the amendments limiting the claims to polymers of alpha-ketoglutarate. The following rejections under section 103 are 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. Claims 1, 5, 7-10 remain rejected under 35 U.S.C. 103 as being unpatentable over Barrett et al., Molecules 2009, 14, 4022-4050 (Barrett II). Barrett II teaches the polymer of α-ketoglutarate (p4037, "Figure 11. Synthesis of chemoselective elastomers based on a-ketoglutaric acid and tetra(ethylene glycol)"). The difference between the applied references and the claimed particles and the claimed inventions is that the references do not teach the invention with particularity so as to amount to anticipation (See M.P.E.P. § 2131: "[t]he identical invention must be shown in as complete detail as is contained in the ... claim." Richardson v. Suzuki Motor Co., 868 F.2d 1226, 1236, 9 USPQ2d 1913, 1920 (Fed. Cir. 1989). The elements must be arranged as required by the claim, but this is not an ipsissimis verbis test, i.e., identity of terminology is not required. In re Bond, 910 F.2d 831, 15 USPQ2d 1566 (Fed. Cir. 1990).). However, based on the above, the references teach the structural elements of the claimed particles with sufficient guidance, particularity, and with a reasonable expectation of success, that the invention would be prima facie obvious to one of ordinary skill (the prior art reference teaches or suggests all the claim limitations with a reasonable expectation of success. See M.P.E.P. § 2143). Barrett II teaches the required polymers and elastomers: PNG media_image1.png 306 884 media_image1.png Greyscale Claims 1, 5, 7-10 and 32 remain rejected under 35 U.S.C. 103 as being unpatentable over U.S. Publication No. 20170066901 based on an application by Yang et al. (Yang). Yang teaches polyester plasticizers based on alpha-ketoglutarate and 1,2-propanediol, see Example 2: PNG media_image2.png 614 492 media_image2.png Greyscale Any plasticizer can be formed into particles. The diol can be variable, see Reaction Scheme 1 on page 3. In this way, the difference between Yang and the claimed inventions is that Yang does not teach the invention with particularity so as to amount to anticipation (See M.P.E.P. § 2131: "[t]he identical invention must be shown in as complete detail as is contained in the ... claim." Richardson v. Suzuki Motor Co., 868 F.2d 1226, 1236, 9 USPQ2d 1913, 1920 (Fed. Cir. 1989). The elements must be arranged as required by the claim, but this is not an ipsissimis verbis test, i.e., identity of terminology is not required. In re Bond, 910 F.2d 831, 15 USPQ2d 1566 (Fed. Cir. 1990).). However, based on the above, Yang teaches the elements of the claimed invention with sufficient guidance, particularity, and with a reasonable expectation of success, that the invention would be prima facie obvious to one of ordinary skill (the prior art reference teaches or suggests all the claim limitations with a reasonable expectation of success. See M.P.E.P. § 2143). Applicant has amended the claims to recite nanoparticles or microparticles. The specification defines nanoparticles at paragraph [0043] of the published application: [0043] As used herein, the term “nanoparticle” refers to a particle having at least one dimension in the range of about 1 nm to about 1000 nm, including any integer value between 1 nm and 1000 nm (including about 1, 2, 5, 10, 20, 50, 60, 70, 80, 90, 100, 150, 200, 250, 300, 400, 500, 600, 700, 800, 900 and 1000 nm and all integers and fractional integers in between). In some embodiments, the nanoparticle has at least one dimension, e.g., a diameter, of about 100 nm. In some embodiments, the nanoparticle has a diameter of about 200 nm. In other embodiments, the nanoparticle has a diameter of about 500 nm. In yet other embodiments, the nanoparticle has a diameter of about 1000 nm (1 μm). In such embodiments, the particle also can be referred to as a “microparticle.” The particles can have any shape. Nanoparticles having a spherical shape are generally referred to as “nanospheres.” The specification defines microparticles at paragraph [0044] of the published application: [0044] As used herein, “microparticle” refers to a particle having at least one dimension in the range of about 1 μm to about 100 μm, including any integer value between 1 μm and 100 μm (including about 1, 2, 5, 10, 20, 30 40, 50, 60, 70, 80, 90 and 100 μm and all integers and fractional integers in between). Exemplary microparticles have a diameter of less than about 100 microns, less than about 50 microns, less than about 10 microns, less than about 5 microns, or less than about 3 microns, or less than about 2 microns. The particles can have any shape. Microparticles having a spherical shape are generally referred to as “microspheres.” The term “particle” as used herein is meant to include nanoparticles and microparticles. Applicant has not established that the polymers of the applied references do not satisfy these definitions. Indeed, those of ordinary skill would expect that the disclosed polymers would qualify as nanoparticles or microparticles, as defined in the specification, based upon their preparation. Therefore, the rejections are maintained. 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. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to KARL J PUTTLITZ whose telephone number is (571)272-0645. The examiner can normally be reached on Monday to Friday from 9 a.m. to 5 p.m. If attempts to reach the examiner by telephone are unsuccessful, the examiner's supervisor, Gregory Emch, can be reached at telephone number 571-272-8149. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of an application may be obtained from the Patent Application Information Retrieval (PAIR) system. Status information for published applications may be obtained from either Private PAIR or Public PAIR. Status information for unpublished applications is available through Private PAIR only. For more information about the PAIR system, see http://pair-direct.uspto.gov. Should you have questions on access to the Private PAIR system, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). /KARL J PUTTLITZ/ Primary Examiner, Art Unit 1646
Read full office action

Prosecution Timeline

Show 1 earlier event
May 28, 2025
Non-Final Rejection mailed — §103
Aug 21, 2025
Response Filed
Oct 24, 2025
Final Rejection mailed — §103
Jan 26, 2026
Request for Continued Examination
Jan 28, 2026
Response after Non-Final Action
Feb 05, 2026
Non-Final Rejection mailed — §103
May 05, 2026
Response Filed
Jul 02, 2026
Final Rejection mailed — §103 (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

5-6
Expected OA Rounds
69%
Grant Probability
88%
With Interview (+18.5%)
2y 6m (~0m remaining)
Median Time to Grant
High
PTA Risk
Based on 1421 resolved cases by this examiner. Grant probability derived from career allowance rate.

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