Prosecution Insights
Last updated: July 17, 2026
Application No. 18/224,124

MEMBRANE ASSEMBLIES AND SEPARATION LAYERS FOR FUEL CELLS AND ELECTROLYZERS

Non-Final OA §102§103§112
Filed
Jul 20, 2023
Priority
Apr 19, 2021 — IL 282438 +1 more
Examiner
GODO, OLATUNJI A
Art Unit
1752
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Hydrolite Ltd.
OA Round
1 (Non-Final)
86%
Grant Probability
Favorable
1-2
OA Rounds
0m
Est. Remaining
95%
With Interview

Examiner Intelligence

Grants 86% — above average
86%
Career Allowance Rate
968 granted / 1128 resolved
+20.8% vs TC avg
Moderate +9% lift
Without
With
+9.4%
Interview Lift
resolved cases with interview
Typical timeline
2y 3m
Avg Prosecution
34 currently pending
Career history
1155
Total Applications
across all art units

Statute-Specific Performance

§101
0.1%
-39.9% vs TC avg
§103
75.4%
+35.4% vs TC avg
§102
17.3%
-22.7% vs TC avg
§112
5.4%
-34.6% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1128 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 . Election/Restrictions Claims 16-20 withdrawn from further consideration pursuant to 37 CFR 1.142(b) as being drawn to a nonelected method, there being no allowable generic or linking claim. Election was made without traverse in the reply filed on 3/12/26. 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. 1. Claims 5 and 6 are rejected under 35 U.S.C. 112, second paragraph, as being indefinite for failing to particularly point out and distinctly claim the subject matter which applicant regards as the invention. 2. It is unclear in claim 5 if “one ionomeric separation layer” (narrow limitation) is a requirement of claim 1 since claim 1 also includes “two ionomeric separation layers” (broad limitation). The use of a narrow numerical range that falls within a broader range in the same claim may render the claim indefinite when the boundaries of the claim are not discernible (MPEP 2173.05(c)). Use of a narrow numerical range that falls within a broader range in the same claim may render the claim indefinite when the boundaries of the claim are not discernible. Description of examples and preferences is properly set forth in the specification rather than in a single claim. A narrower range or preferred embodiment may also be set forth in another independent claim or in a dependent claim. If stated in a single claim, examples and preferences lead to confusion over the intended scope of the claim. In those instances where it is not clear whether the claimed narrower range is a limitation, a rejection under 35 U.S.C. 112(b) or pre-AIA 35 U.S.C. 112, second paragraph should be made. The Examiner should analyze whether the metes and bounds of the claim are clearly set forth. See MPEP § 2173.05(c). 3. In claim 6, the limitation “the respective separation layers” lacks antecedent basis. 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. 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 of this title, 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. 4. Claims 1-4, 6-12 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by, or in the alternative, are rejected under 35 U.S.C. 103 as being obvious over Hunegnaw et al. (US20200216968). 5. Regarding claims 1-4, 6-12, Hunegnaw teaches a membrane assembly for an electrochemical device (see Figs. below), the membrane assembly comprising at least one separation layer that includes surface-charged particles, wherein the surface-charged particles have a surface excess of charges, imparting ion conductivity along that surface when hydrated (see Figs. below). PNG media_image1.png 746 784 media_image1.png Greyscale 6. Regarding claim 3, Hunegnaw teaches wherein (i) the at least one separation layer comprises one separation layer that includes surface-charged particles and has a thickness of at least 30 µm (cathode buffer layer is less than 50 μm [0260]). 7. Regarding claim 6, Hunegnaw wherein a weight % of surface-charged particles in the respective separation layers with surface-charged particles is at least 60% (ion-conducting polymer makes up somewhere in the range between 30 and 70 wt % [0200]) and the respective separation layer is thinner than 1 µm (In general, the thickness of the cathode buffer layer is…200 nm [0259]). 8. Regarding claim 12, Hunegnaw teaches a membrane assembly for an electrochemical device (see Fig. below), the membrane assembly comprising: at least one ionomeric separation layer having a total thickness larger than 1 µm, and at least one protective layer comprising nanoparticles, set adjacent to an anode and/or a cathode of the electrochemical device, and being less than 10 µm thick, wherein the at least one protective layer is configured to separate the at least one ionomeric separation layer from respective anode and/or cathode, and has an ion- conductivity that is smaller than 10 mS/cm (see Fig. below). PNG media_image2.png 494 910 media_image2.png Greyscale 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. 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 of this title, 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. 9. Claims 12-15 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by, or in the alternative, are rejected under 35 U.S.C. 103 as being obvious over Lee et al. (US20160064770). 10. Regarding claims 12-15, Lee teaches a membrane assembly for an electrochemical device (see Fig. below), the membrane assembly comprising: at least one ionomeric separation layer having a total thickness larger than 1 µm, and at least one protective layer comprising nanoparticles, set adjacent to an anode and/or a cathode of the electrochemical device, and being less than 10 µm thick or less than 5 µm thick, wherein the at least one protective layer is configured to separate the at least one ionomeric separation layer from respective anode and/or cathode, and has an ion- conductivity that is smaller than 10 mS/cm (see Fig. below). PNG media_image3.png 712 934 media_image3.png Greyscale 11. Claims 13-15 are rejected under 35 U.S.C. 103 as being unpatentable over Hunegnaw et al. (US20200216968) in view of Lee et al. (US20160064770). 12. Hunegnaw is silent about claims 13-15. 13. Lee teaches components (see Fig. below) for the benefit of an electrochemical device that operates at a high voltage [0043] PNG media_image3.png 712 934 media_image3.png Greyscale PNG media_image2.png 494 910 media_image2.png Greyscale 14. It would have been obvious to a person having ordinary skill in the art before the effective filing date of the claimed invention to have modified Hunegnaw with Lee’s electrochemical device that operates at a high voltage [0043]. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to OLATUNJI GODO whose telephone number is (571)272-3104. The examiner can normally be reached 8:00 am - 5:30 pm. 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, Nicholas Smith can be reached on 571-272-8760. 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. /OLATUNJI A GODO/Primary Examiner, Art Unit 1752
Read full office action

Prosecution Timeline

Jul 20, 2023
Application Filed
Jun 02, 2026
Non-Final Rejection mailed — §102, §103, §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12683176
OXYGEN ELECTRODE CATALYTIC LAYER FOR REVERSIBLE, ALKALINE OR ANION EXCHANGE MEMBRANE ELECTROCHEMICAL DEVICES
2y 6m to grant Granted Jul 14, 2026
Patent 12676345
Battery Apparatus, Battery Management System and Precharging Method
3y 2m to grant Granted Jul 07, 2026
Patent 12671142
BATTERY PACK, ELECTRIC WHEELCHAIR, AND VEHICLE
3y 2m to grant Granted Jun 30, 2026
Patent 12671124
BATTERY MODULE INCLUDING STRUCTURE FOR HEAT EXCHANGE AND FIRE PREVENTION
2y 10m to grant Granted Jun 30, 2026
Patent 12665228
BATTERY PACK
2y 8m to grant Granted Jun 23, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

Strategy Recommendation AI-generated — please review before filing

Get a prosecution strategy drawn from examiner precedents, rejection analysis, and claim mapping.
Typically takes 5-10 seconds — AI-generated, attorney review required before filing

Prosecution Projections

1-2
Expected OA Rounds
86%
Grant Probability
95%
With Interview (+9.4%)
2y 3m (~0m remaining)
Median Time to Grant
Low
PTA Risk
Based on 1128 resolved cases by this examiner. Grant probability derived from career allowance 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