Prosecution Insights
Last updated: April 19, 2026
Application No. 18/219,719

Exhaust Gas Rectifier And Exhaust Gas Purification System

Final Rejection §103
Filed
Jul 10, 2023
Examiner
STANEK, KELSEY L
Art Unit
3741
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
Yanmar Holdings Co. Ltd.
OA Round
4 (Final)
81%
Grant Probability
Favorable
5-6
OA Rounds
2y 8m
To Grant
96%
With Interview

Examiner Intelligence

Grants 81% — above average
81%
Career Allow Rate
519 granted / 644 resolved
+10.6% vs TC avg
Strong +16% interview lift
Without
With
+15.9%
Interview Lift
resolved cases with interview
Typical timeline
2y 8m
Avg Prosecution
18 currently pending
Career history
662
Total Applications
across all art units

Statute-Specific Performance

§101
1.8%
-38.2% vs TC avg
§103
41.1%
+1.1% vs TC avg
§102
26.4%
-13.6% vs TC avg
§112
28.8%
-11.2% vs TC avg
Black line = Tech Center average estimate • Based on career data from 644 resolved cases

Office Action

§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 . 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) 16 is/are rejected under 35 U.S.C. 103 as being unpatentable over Hatta, WO 2012/172945 A1, in view of Ichikawa, US 2009/0092525. Regarding Claim 16 Hatta discloses an exhaust gas rectifier device comprising: an exhaust gas deflector, wherein the exhaust gas deflector (31, mixer containing dispersing members (21-23)) (Hatta, Figure 2) is located in an exhaust pipe (2, exhaust pipe) (Hatta, Figure 2) connecting a oxidation catalyst system (3, oxidation catalyst) (Hatta, Figure 2) and a Selective Catalytic Reduction (SCR) system (4, SCR catalyst) (Hatta, Figure 2), wherein the exhaust pipe (2) comprises a first exhaust pipe (2), the first exhaust pipe (2) comprising a first bending part (2a, curved portion) (Hatta, Figure 2) that connects to the exhaust gas deflector (31) (Hatta, Figure 2), and, wherein the first bending part (2a) and the first exhaust gas pipe (2) are both disposed upstream of the exhaust gas deflector (31) relative to a direction of exhaust gas flow (Hatta, Figure 2). However, Hatta does not explicitly disclose that the exhaust pipe connects a Diesel Particulate Filter (DPF) system and the Selective Catalytic Reduction (SCR) system. Ichikawa teaches an exhaust pipe (11, 12, bent pipe) that connects a DPF system (20, DPF) and a SCR system (30, SCR catalyst) (Ichikawa, Figure 1). Ichikawa further teaches that the DPF system (20) supports an oxidation catalyst to remove SOF, HC, and CO (Ichikawa, [0040]). One having ordinary skill in the art before the effective filing date of the claimed invention would have been motivated to modify Hatta such that the oxidation catalyst system includes a DPF as is taught by Ichikawa in order to remove particulate from the exhaust gas. Allowable Subject Matter Claims 1 and 3-15 are allowed. The following is an examiner’s statement of reasons for allowance: In the exhaust gas rectifier of claim 1, the inclusion of: “an exhaust gas deflector disposed at an upstream side with respect to a urea water injection device” and “ a first exhaust gas pipe comprising a first bending part that connects to the exhaust gas deflector, wherein the first exhaust gas pipe and the first bending part are both disposed upstream of the exhaust gas deflector in the direction of the exhaust gas flows” was not found. Any comments considered necessary by applicant must be submitted no later than the payment of the issue fee and, to avoid processing delays, should preferably accompany the issue fee. Such submissions should be clearly labeled “Comments on Statement of Reasons for Allowance.” Response to Arguments Applicant’s arguments, with respect to the rejection(s) of claim(s) 16 under 35 U.S.C. 102 have been fully considered and are persuasive. Therefore, the rejection has been withdrawn. However, upon further consideration, Applicant’s amendments to the claims have initiated a new ground(s) of rejection of claim 16 under 35 U.S.C. 103. Applicant’s arguments, with respect to the rejection of claims 1 and 3-15 under 35 U.S.C. 103 have been fully considered and are persuasive. The rejection of claims 1 and 3-15 under 35 U.S.C. 103 has been withdrawn. Conclusion 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 KELSEY L STANEK whose telephone number is (571)272-3565. The examiner can normally be reached Mon - Fri 8:30am-3:00pm. 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, MARK LAURENZI can be reached at 571-270-7878. 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. /K.L.S/Examiner, Art Unit 3746 1/26/2026 /MARK A LAURENZI/Supervisory Patent Examiner, Art Unit 3746 1/28/2026
Read full office action

Prosecution Timeline

Jul 10, 2023
Application Filed
Aug 30, 2024
Non-Final Rejection — §103
Dec 04, 2024
Response Filed
Mar 06, 2025
Final Rejection — §103
Jun 13, 2025
Request for Continued Examination
Jun 17, 2025
Response after Non-Final Action
Jun 25, 2025
Non-Final Rejection — §103
Sep 05, 2025
Response Filed
Dec 05, 2025
Final Rejection — §103
Apr 03, 2026
Applicant Interview (Telephonic)
Apr 03, 2026
Examiner Interview Summary

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

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Prosecution Projections

5-6
Expected OA Rounds
81%
Grant Probability
96%
With Interview (+15.9%)
2y 8m
Median Time to Grant
High
PTA Risk
Based on 644 resolved cases by this examiner. Grant probability derived from career allow rate.

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