Prosecution Insights
Last updated: July 17, 2026
Application No. 19/191,472

Vent Seal for Extreme Environment Applications

Final Rejection §102§103
Filed
Apr 28, 2025
Priority
Apr 30, 2024 — CN 202410537387.8
Examiner
KONERU, LAKSHMI S
Art Unit
3675
Tech Center
3600 — Transportation & Electronic Commerce
Assignee
Suzhou Littelfuse OVS Co., Ltd.
OA Round
2 (Final)
63%
Grant Probability
Moderate
3-4
OA Rounds
1y 8m
Est. Remaining
79%
With Interview

Examiner Intelligence

Grants 63% of resolved cases
63%
Career Allowance Rate
312 granted / 498 resolved
+10.7% vs TC avg
Strong +16% interview lift
Without
With
+16.2%
Interview Lift
resolved cases with interview
Typical timeline
2y 11m
Avg Prosecution
24 currently pending
Career history
525
Total Applications
across all art units

Statute-Specific Performance

§101
0.1%
-39.9% vs TC avg
§103
89.0%
+49.0% vs TC avg
§102
9.6%
-30.4% vs TC avg
§112
0.2%
-39.8% vs TC avg
Black line = Tech Center average estimate • Based on career data from 498 resolved cases

Office Action

§102 §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 . Response to Arguments Applicant's arguments filed 05/08/2026 have been fully considered but they are not persuasive. Applicant argues that De reference does not disclose zig-zag shaped openings, as the passages 61,62,63,66 and 67 of De are strictly straight, intersecting orthogonal passages. Examiner notes that De discloses zig-zag shaped openings as seen in examiner annotated fig 7 below. Applicant argues that for Claim 7, Gilmore reference does not disclose the presence of O-rings. Examiner notes that Gilmore teaches O-rings as part of the elastomeric seal at its ends forming rounded elastomer, which are O-rings, similar to the applicant’s disclosure. PNG media_image1.png 860 708 media_image1.png Greyscale Claim Rejections - 35 USC § 102 In the event the determination of the status of the application as subject to AIA 35 U.S.C. 102 and 103 (or as subject to pre-AIA 35 U.S.C. 102 and 103) is incorrect, any correction of the statutory basis (i.e., changing from AIA to pre-AIA ) for the rejection will not be considered a new ground of rejection if the prior art relied upon, and the rationale supporting the rejection, would be the same under either status. 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 – 5 and 8 - 9 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by De et al. (U.S. Patent # 3330563). Regarding Claim 1, De figs 6 and 7 disclose a vent seal (47) disposed in a wall of a sealed enclosure ( wall of 32), comprising: a barrier defining a balloon portion (48) and an integral sealing element (49, 49), wherein the balloon portion extends through an opening in the wall (opening of 54) of the sealed enclosure (32) and wherein the sealing element (49) is disposed within a groove (groove with 49) defined in the wall of the sealed enclosure (wall of 32); and an air router (air router with openings 61, 62, 63, 66, 67) disposed within a recess defined in the wall of the sealed enclosure ( recess in the wall of 32), the air router holding the sealing element within the groove ( air router with passages 61, 62, 63, 66, 67, holding 49 within the groove), wherein the air router defines one or more openings comprising a circuitous route for the passage of air into an interior cavity of the balloon portion of the barrier (air router with openings 61, 62, 63, 66, 67 forming a circuitous route), wherein the circuitous route comprises one or more zig-zag-shaped openings ( air router with openings 61, 62, 63, 66, 67 forming zig-zag-shaped openings as seen in examiner annotated fig 7 below). PNG media_image1.png 860 708 media_image1.png Greyscale Regarding Claim 2, De discloses the vent seal wherein the barrier is composed of flexible rubber (Col 2 : Lines 51 – 52). Regarding Claim 3, De discloses the vent seal wherein the air router is composed of plastic ( Col 2 : Lines 34 – 36). Regarding Claim 4, De discloses the vent seal wherein the circuitous route for the passage of air inhibits the passage or particulates therethrough and into the interior cavity of the balloon portion ( air router with openings 61, 62, 63, 66, 67 forming a circuitous route configured to inhibit the passage or particulates therethrough and into the interior cavity of the balloon portion 48). Regarding Claim 5, De discloses the vent seal wherein the wall of the sealed enclosure defines a cut-out (cut out of 33) around the opening (opening of 54) sized and shaped to accommodate expansion of the balloon portion ( cut out of 33 configured to accommodate expansion of the balloon portion 48). Regarding Claim 8, De discloses the vent seal wherein the balloon portion expands into an interior of the enclosure when air pressure outside of the enclosure is greater than air pressure in the interior of the enclosure (48 configured to expands into an interior of the enclosure when air pressure outside of the enclosure is greater than air pressure in the interior of the enclosure). Regarding Claim 9, De discloses the vent seal wherein the balloon portion collapses when air pressure outside of the enclosure is lower than air pressure in the interior of the enclosure ( 48 configured to collapse when air pressure outside of the enclosure is lower than air pressure in the interior of the enclosure). Claim Rejections - 35 USC § 103 In the event the determination of the status of the application as subject to AIA 35 U.S.C. 102 and 103 (or as subject to pre-AIA 35 U.S.C. 102 and 103) is incorrect, any correction of the statutory basis (i.e., changing from AIA to pre-AIA ) for the rejection will not be considered a new ground of rejection if the prior art relied upon, and the rationale supporting the rejection, would be the same under either status. 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 6 is rejected under 35 U.S.C. 103 as being unpatentable over De in view of Fournier (U.S. Paten # 3940152). Regarding Claim 6, De discloses the vent seal. De does not disclose wherein the cut-out is conically shaped. However, Fournier teaches wherein the cut-out is conically shaped (cut out with 40 is conically shaped, fig 7). It would have been obvious to one of ordinary skill in the art before the effective filing date of the invention to modify the cut-out around the opening of De to be angular as in Fournier with a reasonable expectation of success so that the cut-outs retain the shape of the balloon portion of the barrier. Claim 7 is rejected under 35 U.S.C. 103 as being unpatentable over De in view of Gilmore (U.S. Patent # 4394022). Regarding Claim 7, De discloses the vent seal. De does not disclose wherein the sealing element is an 0-ring and further wherein the groove is circular in shape and formed in the recess around an exterior of the opening through which the balloon portion extends. However, Gilmore teaches wherein the sealing element is an 0-ring (as seen in examiner annotated fig 2 below). It would have been obvious to one of ordinary skill in the art before the effective filing date of the invention to modify the sealing element of De to be an O-ring as in Gilmore with a reasonable expectation of success so that the O-ring is retained in the circular groove. The combination of De and Gilmore discloses further wherein the groove is circular in shape ( De groove of 49) and formed in the recess around an exterior of the opening through which the balloon portion extends (De groove of 49 forms recess around an exterior of the opening of 54 through which the balloon portion 48 extends). PNG media_image2.png 567 681 media_image2.png Greyscale Conclusion 8. 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 extension fee 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 L. SUSMITHA KONERU whose telephone number is (571) 270-5333. The examiner can normally be reached on Monday – Friday from 9 A.M.- 4 P.M. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Christine Mills can be reached on 571.272.8322. 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. /L. K./ Examiner, Art Unit 3675 /CHRISTINE M MILLS/Supervisory Patent Examiner, Art Unit 3675
Read full office action

Prosecution Timeline

Apr 28, 2025
Application Filed
Apr 06, 2026
Non-Final Rejection mailed — §102, §103
May 08, 2026
Response Filed
Jun 11, 2026
Final Rejection mailed — §102, §103 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12674512
SEAL AND METHOD OF MAKING THE SAME
2y 1m to grant Granted Jul 07, 2026
Patent 12669178
Method For Manufacturing Sealing Structure And Sealing Structure
1y 0m to grant Granted Jun 30, 2026
Patent 12663081
SEALING DEVICE
2y 0m to grant Granted Jun 23, 2026
Patent 12644521
SEALING ELEMENT AND MANUFACTURING PROCESS
2y 2m to grant Granted Jun 02, 2026
Patent 12631215
SLIDING COMPONENTS
4y 0m to grant Granted May 19, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

3-4
Expected OA Rounds
63%
Grant Probability
79%
With Interview (+16.2%)
2y 11m (~1y 8m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 498 resolved cases by this examiner. Grant probability derived from career allowance rate.

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