Prosecution Insights
Last updated: April 19, 2026
Application No. 18/255,116

FUEL CELL MEMBRANE HUMIDIFIER

Non-Final OA §102§DP
Filed
May 31, 2023
Examiner
WALLS, CYNTHIA KYUNG SOO
Art Unit
1751
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Kolon Industries Inc.
OA Round
1 (Non-Final)
72%
Grant Probability
Favorable
1-2
OA Rounds
3y 3m
To Grant
72%
With Interview

Examiner Intelligence

Grants 72% — above average
72%
Career Allow Rate
649 granted / 904 resolved
+6.8% vs TC avg
Minimal -0% lift
Without
With
+-0.3%
Interview Lift
resolved cases with interview
Typical timeline
3y 3m
Avg Prosecution
55 currently pending
Career history
959
Total Applications
across all art units

Statute-Specific Performance

§101
0.1%
-39.9% vs TC avg
§103
53.3%
+13.3% vs TC avg
§102
18.9%
-21.1% vs TC avg
§112
22.9%
-17.1% vs TC avg
Black line = Tech Center average estimate • Based on career data from 904 resolved cases

Office Action

§102 §DP
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 without traverse of Species A (figure 6) and species b (figures 13 and 14) in the reply filed on 1/31/2026 is acknowledged. Full consideration was given to claims 1-8. Priority Acknowledgement has been made of applicant’s claim for priority under 35 USC 119 (a-d). The certified copy has been filed on 5/31/2023. Information Disclosure Statement The Information Disclosure Statement (IDS) filed 5/31/2023, 7/23/2024, 8/29/2024, 12/10/2024, 3/20/2025 has been placed in the application file and the information referred to therein has been considered. Drawings The drawings received 5/31/2023 are acceptable for examination purposes. 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. Claims 1 and 8 are rejected under 35 U.S.C. 102(a1) as being anticipated by Kim (WO 2019/235800, using US 2021/0151780 for translation and citation). Regarding claim 1, Kim discloses a fuel cell membrane humidifier comprising: a middle case 110 having a module insertion portion 210 formed therein; a cap case 120 coupled to the middle case; a hollow fiber membrane module C inserted into the module insertion portion; and an active pressure buffer formed between the middle case 110 and the module insertion portion 210 to prevent the module insertion portion from expanding due to a pressure difference between the inside and the outside of the middle case or eliminate a pressure difference, depending on an output situation of a fuel cell. See figure 9 and [0049-0050]. Regarding claim 8, the hollow fiber membrane module includes at least one hollow fiber membrane bundle in which a plurality of hollow fiber membranes are integrated or at least one hollow fiber membrane cartridge C in which a plurality of hollow fiber membranes are accommodated [0043]. 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. Claim 1 is provisionally rejected on the ground of nonstatutory double patenting as being unpatentable over claim 1 of copending Application No. 18/264777. Claim 1 of the copending Application No. 18/264777 discloses all the elements of claim 1 of the instant application. This is a provisional nonstatutory double patenting rejection. Claim 1 is provisionally rejected on the ground of nonstatutory double patenting as being unpatentable over claim 1 of copending Application No. 18/264793. Claim 1 of the copending Application No. 18/264793 discloses all the elements of claim 1 of the instant application. This is a provisional nonstatutory double patenting rejection. Allowable Subject Matter Claims 2-7 are objected to as being dependent upon a rejected base claim, but would be allowable if rewritten in independent form including all of the limitations of the base claim and any intervening claims. The following is a statement of reasons for the indication of allowable subject matter: The closest prior art is Kim (WO 2019/235800, using US 2021/0151780 for translation and citation). Regarding claim 2, Kim discloses the module insertion portion includes an outer partition wall 110a formed to be spaced apart from an inner wall 212 of the middle case 110, but does not disclose nor suggest “the active pressure buffer portion includes a sliding structure formed between the outer partition wall and the inner wall of the middle case.” Claims 3-7 depend from claim 2. Pertinent Prior Art Ahn (WO 2021/107679, using US 2022/0344684 as translation) – Ahn discloses an active pressure buffer portion between the middle case and the module insertion portion in a fuel cell membrane humidifier. The active pressure buffer portion includes protrusions, but does not disclose protrusions in a sliding structure. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to CYNTHIA KYUNG SOO WALLS whose telephone number is (571)272-8699. The examiner can normally be reached on M-F until 5pm. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Jonathan Leong can be reached at 571-270-1292. 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). If you would like assistance from a USPTO Customer Service Representative or access to the automated information system, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. /CYNTHIA K WALLS/ Primary Examiner, Art Unit 1751
Read full office action

Prosecution Timeline

May 31, 2023
Application Filed
Feb 03, 2026
Non-Final Rejection — §102, §DP (current)

Precedent Cases

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Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

1-2
Expected OA Rounds
72%
Grant Probability
72%
With Interview (-0.3%)
3y 3m
Median Time to Grant
Low
PTA Risk
Based on 904 resolved cases by this examiner. Grant probability derived from career allow rate.

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