Prosecution Insights
Last updated: July 17, 2026
Application No. 17/952,289

ELECTROMAGNETIC VALVE FOR FUEL CELL SYSTEM AND FUEL CELL SYSTEM

Final Rejection §103
Filed
Sep 25, 2022
Examiner
JELLETT, MATTHEW WILLIAM
Art Unit
3753
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
Eco Holding 1 GmbH
OA Round
4 (Final)
80%
Grant Probability
Favorable
5-6
OA Rounds
0m
Est. Remaining
98%
With Interview

Examiner Intelligence

Grants 80% — above average
80%
Career Allowance Rate
869 granted / 1084 resolved
+10.2% vs TC avg
Strong +18% interview lift
Without
With
+17.5%
Interview Lift
resolved cases with interview
Typical timeline
2y 4m
Avg Prosecution
38 currently pending
Career history
1118
Total Applications
across all art units

Statute-Specific Performance

§101
0.1%
-39.9% vs TC avg
§103
81.0%
+41.0% vs TC avg
§102
7.3%
-32.7% vs TC avg
§112
8.9%
-31.1% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1084 resolved cases

Office Action

§103
DETAILED ACTION Final 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 . Response to Amendment/Arguments Claims 1, 3-14 are pending. Claim 1 is currently amended. Claims 13 and 14 are newly added. It appears that no new matter has been entered. Applicant remarks are persuasive regarding Baker as primary reference and in consideration of the amended claims. Accordingly, further search and consideration has been provided and newly cited primary reference Leary as discussed below is combined with Baker. The remarks are considered moot and this action must be made Final. 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. Claim(s) 1, 3, 5, 7-14 is/are rejected under 35 U.S.C. 103 as being unpatentable over Leary (US 9520604) and further in view of Baker (US 3580267); Claim(s) 4 and 6 is/are rejected under 35 U.S.C. 103 as being unpatentable over Leary in view of Baker as applied to claim 1 above, and further in view of Butz (US 6044829); Leary discloses in claim 1: (see at least annotated figure 2 below) PNG media_image1.png 594 724 media_image1.png Greyscale An electromagnetic valve (100 figure 2) to be connected to an anode supply of a fuel cell system (the phrase considered a statement of intended use as it adds no meaningful limitation to the body of the claimed apparatus under MPEP 2114, nonetheless, 100 is connected to the anode supply outlet of a fuel cell system Col 4 ln 46-55), the electromagnetic valve configured as a purge or drain valve (only open when purging/draining/allowing hydrogen to exit), comprising: an actuator (solenoid) including a first magnet coil (the solenoid coil of 150) configured to electromagnetically actuate an armature (140), and a valve plunger (125) operatively connected with the armature (where the plunger opens and closes the valve 115/120); a connection spout (of 101 at 110) to be connected to the anode supply (as discussed above), the connection spout provided in one, materially integral piece (as shown) containing a valve seat (120), an inlet (at 110) and an outlet (at 130), wherein the valve seat is openable and closable as a function of an actuation of the valve plunger (as shown, spring biased closed, and opens via electro magnet armature opening the valve) so that a media connection between the inlet and the outlet is controlled through a valve chamber (via at 3002), wherein the connection spout (as shown) is connected with the actuator (at the junction between 101 and solenoid), and wherein the valve chamber (2002) is formed (arranged axially) between the connection spout (101/110) and the valve plunger (at 120); Leary does not disclose, although Baker teaches: PNG media_image2.png 850 1062 media_image2.png Greyscale an additional magnet coil (at 48 is a coil heater that will also generate a measure of magnetic flux there about when the current runs resistively there through for the thermal resistance heat control, where 48 indicates a coil winding see MPEP 608.02 IX) is provided as a heating coil (Col 4 ln 58-60, where the coil includes a circumscribing heating wire about the seat 38) wherein the additional magnet coil (48) is separate from the first magnet coil (100, axially as well as radially, and arranged interposed between the connection spout and the solenoid, for the purpose of providing electrical heat to circumscribe about the valve seat and valve chamber, to reduce freezing of fluid material and promote adequate fluid flow characterization); Accordingly, it would have been obvious to one of ordinary skill in the art at the time of filing of the invention to provide in Leary as taught in Baker, an additional magnet coil as taught in Baker with a coil heater that also generates a measure of magnetic flux there about when the current runs resistively there through for the thermal resistance heat control, as taught in Baker and where such a heating coil can be circumscribed as a heating wire about the seat of Leary as taught in Baker, and wherein such an additional magnet coil is axially and radially circumscribed within and from the first magnet coil as taught in Baker, and can be arranged and/or interposed between the connection spout and the solenoid, all for the purpose of providing electrical heat to circumscribe about the valve seat and valve chamber, to reduce freezing of fluid material and promote adequate fluid flow characterization; Comment: Leary discusses providing a slip stream improvement to the prior art in the embodiment of figure 3, but it is noted that the prior art’s mere disclosure of more than one alternative does not constitute a teaching away from the above alternative because such disclosure does not criticize, discredit, or otherwise discourage the solution claimed. See In re Fulton, 391 F.3d 1195, 73 USPQ2d 1141 (Fed. Cir. 2004); MPEP 2143.01 I. Leary discloses (as modified for the reasons discussed above) in claim 3: The electromagnetic valve according to claim 1, wherein the heating coil (48) is arranged between the actuator and the connection spout (axially) and wherein the heating coil radially envelops (120.Leary/38.Baker) the valve seat (as modified for the reasons discussed above.) Leary discloses(as modified for the reasons discussed above) in claim 4: The electromagnetic valve according to claim 1, wherein the connection spout is [a] part and the heating coil is integral in the connection spout proximal to the valve seat (as modified for the reasons discussed above as shown); but Leary/Baker does not explicitly disclose… although Butz teaches: an injection molded parts (synthetic resin body figure 4 with heater 20) into the connection spout (10 outlet passage) proximal to the valve seat (of 18, all for the purpose of providing the heater close to the valve itself and to provide a final form plastic part for ease of assembly of the valve); accordingly, it would have been obvious to one of ordinary skill in the art at the time of filing of the invention to provide and arrange Leary/Baker heating coil as taught by the Butz arrangement in an injection molded assembly of parts, via an encasement of synthetic resin body as taught in Butz where the connection spout is proximal to the valve seat as taught in Butz, all for the purpose of providing for example, the heater close to the valve itself and to provide a final form plastic part for ease of assembly of the valve. Leary discloses (as modified for the reasons discussed above) in claim 5: The electromagnetic valve according to claim 3, wherein the heating coil is attached at the actuator by the connection spout (via 106.Baker, for the purpose of providing electrical current) Leary discloses (as modified for the reasons discussed above) in claim 6: The electromagnetic valve according to claim 4, wherein the heating coil includes an additional electrical contact (Baker, the coil/ring has two contacts as shown at 50 and as discussed to provide for current flow through the ring/coil.) Leary discloses (as modified for the reasons discussed above) in claim 7: the valve according to claim 1: arranging a discharge valve (115/1120 figure 2) in a fuel cell system (as discussed above), comprising: at least one fuel cell stack (Col 4 ln 46-55); a cathode supply (from the anode to the cathode via 130); an anode supply (from 110); and the valve arranged in the anode supply (from 110 which is arranged in the hydrogen gas line to the exhaust outlet.) Leary discloses (as modified for the reasons discussed above) in Claim 8: The electromagnetic valve according to claim 1, wherein the first magnet coil and the additional magnet coil are arranged coaxially (about the center line of the plunger as modified for the reasons discussed above) and separated from each other by an axial gap (distance at 2002 as applied to Leary) arranged between the first magnet coil and the additional magnet coil (as shown.) Leary discloses (as modified for the reasons discussed above) in Claim 9: the electromagnetic valve according to claim 1, wherein the outer diameter (at 2004) of the additional magnet coil is smaller than an outer diameter (at 2006) of the first magnet coil (as discussed above.) Leary discloses (as modified for the reasons discussed above) in Claim 10: the electromagnetic valve according to claim 9, wherein and entirety of the additional magnet coil (the coil 48 is fully circumscribed where 2004 is within 2006 circumscribed diameter as shown) is arranged inside an inner diameter first magnet coil. Leary discloses (as modified for the reasons discussed above) in Claim 11: the electromagnetic valve according to claim 1, wherein an entirety of the additional magnet coil is axially offset from the armature (the magnetic armature is fully below the diaphragm and the additional magnet coil.) Leary discloses (as modified for the reasons discussed above) in Claim 12: The electromagnetic valve according to claim 1, wherein the valve chamber (3002) is formed (interposed) between the connection spout (110) and the valve plunger (125.) Leary discloses in claim 13: An electromagnetic valve (100 figure 2) to be connected to an anode supply of a fuel cell system (the phrase considered a statement of intended use as it adds no meaningful limitation to the body of the claimed apparatus under MPEP 2114, nonetheless, 100 is connected to the anode supply outlet of a fuel cell system Col 4 ln 46-65), the electromagnetic valve configured as a purge or drain valve (only open when purging/draining/allowing hydrogen to exit), comprising: an actuator (solenoid) including a first magnet coil (at 150) configured to electromagnetically actuate an armature (140), and a valve plunger (125) operatively connected with the armature and a compression spring (at 3004); a connection spout (at 101/110) to be connected to the anode supply (as discussed above), the connection spout provided in one, materially integral piece (as shown) containing a valve seat (120), an inlet and an outlet (110/130), wherein the valve seat is openable and closable as a function of an actuation of the valve plunger so that a media connection (hydrogen fluid connection) between the inlet and the outlet is controlled through a valve chamber (at 3002), wherein the connection spout is connected with the actuator (at junction between 101 and solenoid), wherein the compression spring is located outside the connection spout (and inside the solenoid stator core, and provided to bias close the solenoid as a normally biased closed solenoid valve, that provides for closure without the need of electrical current); Leary does not disclose, although Baker teaches: an additional magnet coil (at 48) is provided as a heating coil (Col 4 ln 58-60, where the coil includes a circumscribing heating wire about the seat 38), wherein the additional magnet coil (48) is separate from the first magnet coil (100); Accordingly, it would have been obvious to one of ordinary skill in the art at the time of filing of the invention to provide in Leary as taught in Baker, an additional magnet coil as taught in Baker with a coil heater that also generates a measure of magnetic flux there about when the current runs resistively there through for the thermal resistance heat control, as taught in Baker and where such a heating coil can be circumscribed as a heating wire about the seat of Leary as taught in Baker, and wherein such an additional magnet coil is axially and radially circumscribed within and from the first magnet coil as taught in Baker, and can be arranged and/or interposed between the connection spout and the solenoid, all for the purpose of providing electrical heat to circumscribe about the valve seat and valve chamber, to reduce freezing of fluid material and promote adequate fluid flow characterization; Leary discloses (as modified for the reasons discussed above) in claim 14: The electromagnetic valve according to claim 13, wherein the compression spring is configured to push the valve plunger toward the connection spout (as shown and discussed above.) Conclusion The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. Applicant's amendment necessitated the new ground(s) of rejection presented in this Office action. Accordingly, THIS ACTION IS MADE FINAL. See MPEP § 706.07(a). 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. Any inquiry concerning this communication or earlier communications from the examiner should be directed to MATTHEW W JELLETT, whose telephone number is 571-270-7497. The examiner can normally be reached on Monday-Friday (9:30AM-6:00PM EST). If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisors can be reached by phone. Ken Rinehart can be reached at (571)-272-4881, or Craig Schneider can be reached at (571) 272-3607. 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. /Matthew W Jellett/Primary Examiner, Art Unit 3753
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Prosecution Timeline

Show 3 earlier events
Oct 01, 2025
Final Rejection mailed — §103
Dec 31, 2025
Request for Continued Examination
Jan 06, 2026
Response after Non-Final Action
Jan 27, 2026
Non-Final Rejection mailed — §103
Apr 21, 2026
Applicant Interview (Telephonic)
Apr 21, 2026
Examiner Interview Summary
Apr 27, 2026
Response Filed
Jun 08, 2026
Final Rejection mailed — §103 (current)

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Prosecution Projections

5-6
Expected OA Rounds
80%
Grant Probability
98%
With Interview (+17.5%)
2y 4m (~0m remaining)
Median Time to Grant
High
PTA Risk
Based on 1084 resolved cases by this examiner. Grant probability derived from career allowance rate.

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