Prosecution Insights
Last updated: April 19, 2026
Application No. 18/005,038

METHOD FOR PRODUCING A BIPOLAR PLATE STRAND, METHOD FOR PRODUCING A BIPOLAR PLATE, AND DEVICE FOR IMPLEMENTING THE METHOD

Non-Final OA §112
Filed
Jan 10, 2023
Examiner
GUPTA, SARIKA
Art Unit
1729
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Audi AG
OA Round
1 (Non-Final)
74%
Grant Probability
Favorable
1-2
OA Rounds
3y 1m
To Grant
96%
With Interview

Examiner Intelligence

Grants 74% — above average
74%
Career Allow Rate
119 granted / 161 resolved
+8.9% vs TC avg
Strong +22% interview lift
Without
With
+22.1%
Interview Lift
resolved cases with interview
Typical timeline
3y 1m
Avg Prosecution
22 currently pending
Career history
183
Total Applications
across all art units

Statute-Specific Performance

§101
0.6%
-39.4% vs TC avg
§103
54.9%
+14.9% vs TC avg
§102
17.9%
-22.1% vs TC avg
§112
18.4%
-21.6% vs TC avg
Black line = Tech Center average estimate • Based on career data from 161 resolved cases

Office Action

§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 . 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. Claim 1, thus dependent claims 2-8 and 9-10 are rejected under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), second paragraph, as being indefinite for failing to particularly point out and distinctly claim the subject matter which the inventor or a joint inventor (or for applications subject to pre-AIA 35 U.S.C. 112, the applicant), regards as the invention. Claims 1, 9 and 10 recite, “heated to a joining temperature immediately before”…It is unclear at what temperature and for how long the heating needs to take place. Since the claims are directed to method steps, the temperature and time of the heating appears to be an important step in the method of producing the bipolar plate. Applicant is required to respond to the 112 rejection noted and provide the necessary information as needed. Allowable Subject Matter Claims 1-10 are allowed, however, Applicant must respond to the 112 rejection noted above. As allowable subject matter has been indicated, applicant's reply must either comply with all formal requirements or specifically traverse each requirement not complied with. See 37 CFR 1.111(b) and MPEP § 707.07(a). The prior art searches does not teach: A method for producing a bipolar plate strand, comprising a plurality of interconnected bipolar plates of a fuel cell, the method comprising: providing of a first unipolar plate strand and a second unipolar plate strand, the unipolar plate strands comprising a plurality of at least preformed webs and a plurality of at least preformed ducts running between every two adjacent web, moving of the unipolar plate strands in the direction of a roll gap of a roll pair provided with roll structures of a rolling device, sending of a laser beam of a laser device onto a rotating mirrored polygon wheel the laser beam being directed at a plurality of individual positions of a surface of one or both of the unipolar plate strands and the individual positions are thus heated to a joining temperature immediately before or upon entry of the unipolar plate strands in the roll gap; and joining of the unipolar plate strands at least at one of the individual positions of the surface to form a bipolar plate strand upon transporting of the unipolar plate strands through the roll gap under the action of pressure. The following are the closest prior art found: US20060027634A1 (Sigler)- teaches a roll bonding of bipolar plates, and teaches Specifically, the prior art searches fail to teach the claimed rotating mirrored polygon wheel. Sigler teaches the rolling and moving/pressing as claimed [0040-0043, fig. 7], however does not teach sending of a laser beam of a laser device onto a rotating mirrored polygon wheel the laser beam being directed at a plurality of individual positions of a surface of one or both of the unipolar plate strands and the individual positions are thus heated to a joining temperature immediately before or upon entry of the unipolar plate strands in the roll gap as claimed. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to SARIKA GUPTA whose telephone number is (571)272-9907. The examiner can normally be reached 8:30AM-5:30PM. 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, Ula Ruddock can be reached at 571-272-1481. 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. /S.G./Examiner, Art Unit 1729 /ULA C RUDDOCK/Supervisory Patent Examiner, Art Unit 1729
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Prosecution Timeline

Jan 10, 2023
Application Filed
Mar 13, 2026
Non-Final Rejection — §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12603307
APPARATUS AND METHOD FOR CORRECTING OFFSET OF PRESSURE SENSOR IN FUEL CELL SYSTEM
2y 5m to grant Granted Apr 14, 2026
Patent 12597684
EXTERNAL SHORT-CIRCUIT DEVICE AND BATTERY MODULE INCLUDING THE SAME
2y 5m to grant Granted Apr 07, 2026
Patent 12592438
ELECTRONIC DEVICE AND MANUFACTURING METHOD THEREFOR
2y 5m to grant Granted Mar 31, 2026
Patent 12580246
Battery Pack and Device Including the Same
2y 5m to grant Granted Mar 17, 2026
Patent 12580211
FUEL CELL SYSTEM
2y 5m to grant Granted Mar 17, 2026
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
74%
Grant Probability
96%
With Interview (+22.1%)
3y 1m
Median Time to Grant
Low
PTA Risk
Based on 161 resolved cases by this examiner. Grant probability derived from career allow rate.

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