Prosecution Insights
Last updated: July 17, 2026
Application No. 19/226,421

EXHAUST GAS RECIRCULATION SYSTEM FOR ENGINE

Non-Final OA §102
Filed
Jun 03, 2025
Priority
Jun 11, 2024 — JP 2024-094240
Examiner
HOLBROOK, TEUTA BAJRAMOVIC
Art Unit
Tech Center
Assignee
MAZDA MOTOR Corporation
OA Round
1 (Non-Final)
72%
Grant Probability
Favorable
1-2
OA Rounds
1y 2m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 72% — above average
72%
Career Allowance Rate
461 granted / 638 resolved
+12.3% vs TC avg
Strong +26% interview lift
Without
With
+26.3%
Interview Lift
resolved cases with interview
Typical timeline
2y 3m
Avg Prosecution
17 currently pending
Career history
664
Total Applications
across all art units

Statute-Specific Performance

§101
0.8%
-39.2% vs TC avg
§103
79.7%
+39.7% vs TC avg
§102
13.9%
-26.1% vs TC avg
§112
5.1%
-34.9% vs TC avg
Black line = Tech Center average estimate • Based on career data from 638 resolved cases

Office Action

§102
DETAILED ACTION Claim Objections Claims 1-15 are objected to because of the following informalities: Regarding claims 1-3, claim 1 recites “a preset EGR region” and later in claims 1-3 recites “the EGR region”; “the EGR region” should recite --the preset EGR region--. Similarly, claim 2 recites “the set flow rate”, which should recite --the predetermined set flow rate--. Claim 2 recites “in a region”, which should recite --is the region--. Regarding claim 3, “the low-temperature EGR region” should recite --the predetermined low-temperature EGR region--. Claims 4-15 should also include “predetermined” in regards to the first, second or third temperatures. Optionally, regarding claims 1-15, applicant could omit words “preset” or “predetermined”. Regarding claim 4, “than when the intake air temperature is higher” should be deleted; it is unnecessary. Regarding claim 5, “then when the intake temperature is equal to or higher than the second set temperature” should be deleted. Regarding claims 7 and 8, “than when the intake air temperature is higher” should be deleted. Appropriate correction is required. 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. Claim(s) 1, 2, 7, 11 and 12 is/are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Takaki (US 2015/0211447 A1). Regarding claim 1, Takaki discloses an exhaust gas recirculation system for an engine (Fig. 1) including: an engine body (1) that is formed with a combustion chamber; an exhaust passage (3) that is connected to the engine body and through which exhaust gas introduced from the engine body flows; and an intake passage (2) that is connected to the engine body and through which intake air to be introduced into the engine body flows, the exhaust gas recirculation system comprising: an intake air temperature sensor (28) that detects an intake air temperature; an exhaust gas recirculation (EGR) passage (20) that connects the exhaust passage and the intake passage to recirculate EGR gas as part of the exhaust gas to the intake passage (Fig. 1); an EGR valve (21) that opens and closes the EGR passage to change an EGR amount that is an amount of the EGR gas to be recirculated to the intake passage; and a controller (25) that executes EGR control for recirculating the EGR gas by opening the EGR valve when the engine is being operated in a preset EGR region [0016], wherein in a case where the intake air temperature that is detected by the intake air temperature sensor is lower than a first set temperature, the controller prohibits the EGR control even when the engine is being operated in the EGR region under a condition that an intake air flow rate of the intake air flowing through the intake passage is lower than a predetermined set flow rate [0025]. Regarding claim 2, Takaki discloses the exhaust gas recirculation system according to claim 1, wherein when the intake air temperature is lower than the first set temperature, the controller determines whether the engine is being operated in a predetermined low-temperature EGR region in the EGR region, and executes the EGR control when the engine is being operated in the low- temperature EGR region, the low-temperature EGR region being set in advance in a region where the intake air flow rate is equal to or higher than the set flow rate [0023]. Regarding claim 7, Takaki discloses the exhaust gas recirculation system according to claim 1, wherein during execution of the EGR control, the controller controls the EGR valve so that a maximum value of the EGR amount becomes lower when the intake air temperature is lower than the first set temperature than when the intake air temperature is higher [0023]. Allowable Subject Matter Claims 3-6 and 8-15 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. Conclusion The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. Any inquiry concerning this communication or earlier communications from the examiner should be directed to TEUTA B HOLBROOK whose telephone number is (571)270-3276. The examiner can normally be reached Monday - Friday 8am-4:30pm EST. 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, LINDSAY LOW can be reached at 571-272-1196. 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. /TEUTA HOLBROOK/ Examiner Art Unit 3747 /GEORGE C JIN/ Primary Examiner, Art Unit 3747
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Prosecution Timeline

Jun 03, 2025
Application Filed
Jun 16, 2026
Non-Final Rejection mailed — §102 (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
99%
With Interview (+26.3%)
2y 3m (~1y 2m remaining)
Median Time to Grant
Low
PTA Risk
Based on 638 resolved cases by this examiner. Grant probability derived from career allowance rate.

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