Prosecution Insights
Last updated: July 17, 2026
Application No. 18/277,854

OXY-FUEL BURNER, IGNITION AND FLAME CONTROL SYSTEM AND METHOD FOR CONTROLLING IGNITION AND FLAME

Final Rejection §112
Filed
Aug 18, 2023
Priority
Mar 02, 2021 — RU 2021105389 +1 more
Examiner
JONES, LOGAN P
Art Unit
3762
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
L'Air Liquide, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude
OA Round
2 (Final)
43%
Grant Probability
Moderate
3-4
OA Rounds
6m
Est. Remaining
76%
With Interview

Examiner Intelligence

Grants 43% of resolved cases
43%
Career Allowance Rate
226 granted / 527 resolved
-27.1% vs TC avg
Strong +33% interview lift
Without
With
+32.6%
Interview Lift
resolved cases with interview
Typical timeline
3y 5m
Avg Prosecution
49 currently pending
Career history
586
Total Applications
across all art units

Statute-Specific Performance

§101
0.1%
-39.9% vs TC avg
§103
94.4%
+54.4% vs TC avg
§102
1.7%
-38.3% vs TC avg
§112
3.2%
-36.8% vs TC avg
Black line = Tech Center average estimate • Based on career data from 527 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 . DETAILED ACTION Claim Interpretation The following is a quotation of 35 U.S.C. 112(f): (f) Element in Claim for a Combination. – An element in a claim for a combination may be expressed as a means or step for performing a specified function without the recital of structure, material, or acts in support thereof, and such claim shall be construed to cover the corresponding structure, material, or acts described in the specification and equivalents thereof. The following is a quotation of pre-AIA 35 U.S.C. 112, sixth paragraph: An element in a claim for a combination may be expressed as a means or step for performing a specified function without the recital of structure, material, or acts in support thereof, and such claim shall be construed to cover the corresponding structure, material, or acts described in the specification and equivalents thereof. The claims in this application are given their broadest reasonable interpretation using the plain meaning of the claim language in light of the specification as it would be understood by one of ordinary skill in the art. The broadest reasonable interpretation of a claim element (also commonly referred to as a claim limitation) is limited by the description in the specification when 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph, is invoked. As explained in MPEP § 2181, subsection I, claim limitations that meet the following three-prong test will be interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph: (A) the claim limitation uses the term “means” or “step” or a term used as a substitute for “means” that is a generic placeholder (also called a nonce term or a non-structural term having no specific structural meaning) for performing the claimed function; (B) the term “means” or “step” or the generic placeholder is modified by functional language, typically, but not always linked by the transition word “for” (e.g., “means for”) or another linking word or phrase, such as “configured to” or “so that”; and (C) the term “means” or “step” or the generic placeholder is not modified by sufficient structure, material, or acts for performing the claimed function. Use of the word “means” (or “step”) in a claim with functional language creates a rebuttable presumption that the claim limitation is to be treated in accordance with 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph. The presumption that the claim limitation is interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph, is rebutted when the claim limitation recites sufficient structure, material, or acts to entirely perform the recited function. Absence of the word “means” (or “step”) in a claim creates a rebuttable presumption that the claim limitation is not to be treated in accordance with 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph. The presumption that the claim limitation is not interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph, is rebutted when the claim limitation recites function without reciting sufficient structure, material or acts to entirely perform the recited function. Claim limitations in this application that use the word “means” (or “step”) are being interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph, except as otherwise indicated in an Office action. Conversely, claim limitations in this application that do not use the word “means” (or “step”) are not being interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph, except as otherwise indicated in an Office action. This application includes one or more claim limitations that do not use the word “means,” but are nonetheless being interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph, because the claim limitation(s) uses a generic placeholder that is coupled with functional language without reciting sufficient structure to perform the recited function and the generic placeholder is not preceded by a structural modifier. Such claim limitation(s) is/are: “a system for automatically controlling the ignition and flame control of a burner” in claim 16; “an ignition device” in claim 27; “a combustion-signalling device” in claim 27. Because this/these claim limitation(s) is/are being interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph, it/they is/are being interpreted to cover the corresponding structure described in the specification as performing the claimed function, and equivalents thereof. If applicant does not intend to have this/these limitation(s) interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph, applicant may: (1) amend the claim limitation(s) to avoid it/them being interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph (e.g., by reciting sufficient structure to perform the claimed function); or (2) present a sufficient showing that the claim limitation(s) recite(s) sufficient structure to perform the claimed function so as to avoid it/them being interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph. 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. Claims 16-24 and 27-30 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. Claim 16 has been amended to recite “wherein a distance (L2) from the downstream extremity of the combined ignition and flame-control electrode to the downstream extremity of the housing of the burner is equal to 0.5d.” The claim does not provide clarification of what “d” is. It is clear from the applicant’s specification that “d” is in reference to a diameter of the oxidant injector. Allowable Subject Matter Claims 16-24 and 27-30 possess allowable subject matter. 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 following is a statement of reasons for the indication of allowable subject matter: None of the prior art of record teaches or suggests an oxy-fuel burner with all of the limitations of independent claim 16. Claim 16 recites the limitation “wherein a distance (L2) from the downstream extremity of the combined ignition and flame-control electrode to the downstream extremity of the housing of the burner is equal to 0.5d.” The claim does not provide clarification of what “d” is. It is clear from the applicant’s specification that “d” is in reference to a diameter of the oxidant injector. The closest prior art of record to claim 16 is the previously cited Iatrides and Smirnov. Iatrides discloses an oxidant injector having a diameter d, and Smirnov teaches an ignition and flame control electrode positioned a distance L2 from the downstream extremity of the burner. However, neither reference teaches wherein L2 is 0.5d. No other art was found such that further modification of Iatrides and Smirnov would have made claim 16 obvious. Therefore, these limitations, when combined with every other limitation of the claim, distinguish the claim from the prior art. The other claims are allowable at least because they depend from allowable independent claim 16. Conclusion The prior art made of record and not relied upon is considered pertinent to applicant's disclosure: Hura (US 5655899 A) PNG media_image1.png 484 570 media_image1.png Greyscale Nolte (US 5899683 A) “The control circuit 7 counts the attempts at ignition of the automatic control unit 9 and then opens the circuit breaker 12 after a certain time, e.g., 10 sec after the end of the fourth attempt, so that the automatic control unit 9 will now also close the safety valve 10 for safety. A high level of safety of operation is thus achieved” Legiret (US 6190158 B1) PNG media_image2.png 390 564 media_image2.png Greyscale Bodelin (US 6332340 B1) PNG media_image3.png 378 712 media_image3.png Greyscale Scimone (US 20100009306 A1) “flame detection, for instance by means of a ionisation electrode the second tube 3, provided for the passage of comburent gas” PNG media_image4.png 314 778 media_image4.png Greyscale Orita (TW 201319469 A) PNG media_image5.png 374 692 media_image5.png Greyscale Langius (US 20170292698 A1) uses “a flame rod 13” and “the ionization sensor 13” interchangeably 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 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 LOGAN P JONES whose telephone number is (303)297-4309. The examiner can normally be reached Mon-Fri 8:30-5:00 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, Michael Hoang can be reached at (571) 272-6460. 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. /LOGAN P JONES/Examiner, Art Unit 3762 /MICHAEL G HOANG/Supervisory Patent Examiner, Art Unit 3762
Read full office action

Prosecution Timeline

Aug 18, 2023
Application Filed
Nov 03, 2025
Non-Final Rejection mailed — §112
Mar 06, 2026
Response after Non-Final Action
Mar 06, 2026
Response Filed
Mar 24, 2026
Response Filed
Jun 24, 2026
Final Rejection mailed — §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12666505
DOOR OPENING SPEED CONTROLLER AND AUTOMATIC OPENING STRUCTURE FOR AN APPLIANCE
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Patent 12655985
GAS VALVE AND GAS STOVE
4y 9m to grant Granted Jun 16, 2026
Patent 12644609
ELECTRICAL HOUSEHOLD SYSTEM AND METHOD OF CONTROLLING AN ELECTRICAL HOUSEHOLD SYSTEM
3y 4m to grant Granted Jun 02, 2026
Patent 12638173
HYDROGEN GAS BURNER
1y 9m to grant Granted May 26, 2026
Patent 12624830
BURNER SYSTEM AND METHOD FOR PROVIDING THERMAL ENERGY
4y 10m to grant Granted May 12, 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
43%
Grant Probability
76%
With Interview (+32.6%)
3y 5m (~6m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 527 resolved cases by this examiner. Grant probability derived from career allowance rate.

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