Prosecution Insights
Last updated: July 17, 2026
Application No. 18/719,633

Arrangement for Heating a Process Gas of an Iron Ore Pelletizing Plant

Non-Final OA §112
Filed
Jun 13, 2024
Priority
Feb 17, 2022 — SE 2250162-1 +1 more
Examiner
LIANG, ANTHONY M
Art Unit
Tech Center
Assignee
Hybrit Development AB
OA Round
1 (Non-Final)
83%
Grant Probability
Favorable
1-2
OA Rounds
10m
Est. Remaining
93%
With Interview

Examiner Intelligence

Grants 83% — above average
83%
Career Allowance Rate
563 granted / 675 resolved
+23.4% vs TC avg
Moderate +10% lift
Without
With
+9.7%
Interview Lift
resolved cases with interview
Typical timeline
2y 11m
Avg Prosecution
34 currently pending
Career history
704
Total Applications
across all art units

Statute-Specific Performance

§101
0.4%
-39.6% vs TC avg
§103
58.4%
+18.4% vs TC avg
§102
3.6%
-36.4% vs TC avg
§112
20.3%
-19.7% vs TC avg
Black line = Tech Center average estimate • Based on career data from 675 resolved cases

Office Action

§112
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 Objections Claim 1 is objected to because of the following informalities: In line 7, “and a to” should read “and to a”. Appropriate correction is required. 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 9-15 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 9 recites “supplying a gaseous fuel and oxidant gas to the burner assembly, thereby introducing the gaseous fuel and oxidant gas into the chamber, where they react,” which renders the claim indefinite, because it is unclear what “they” is referring to. For the purposes of examination, claim 9 is given the broadest reasonable interpretation such that the limitation “supplying a gaseous fuel and oxidant gas to the burner assembly, thereby introducing the gaseous fuel and oxidant gas into the chamber, where they react” is interpreted as –supplying a gaseous fuel and oxidant gas to the burner assembly, thereby introducing the gaseous fuel and oxidant gas into the chamber, where the gaseous fuel and oxidant gas react–. Claims 11-15 are dependent on claim 11 and are thus also rejected for the same reasons. Claim 11 recites the limitation “composed essentially of recycled gas streams,” which renders the claim indefinite, because the metes and bounds of the limitation “composed essentially of” is unclear. For the purposes of examination, claim 11 is given the broadest reasonable interpretation such that the limitation “composed essentially of” is interpreted as –composed of–. Allowable Subject Matter Claims 1-8 are allowed. Claims 9-15 would be allowable if rewritten to overcome the rejection(s) under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), 2nd paragraph, set forth in this Office action and to include all of the limitations of the base claim and any intervening claims. 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: Regarding claim 1, the prior art fails to disclose or fairly suggest the arrangement for heating a process gas of an iron ore pelletizing plant as recited. In particular, the closest prior art, Cain et al. (US 2010/0244336), as cited in the IDS dated 6/13/2024, hereinafter “Cain,” teaches an arrangement for heating a process gas of an iron ore pelletizing plant, wherein the arrangement comprises a process gas inlet, a process gas outlet, a wall extended from the process gas inlet to the process gas outlet, and a heating chamber port arranged in the wall at a point intermediate to the process gas inlet and the process gas outlet, and a burner assembly arranged to be connectible to a source of gaseous fuel and to a source of oxidant gas (Fig. 5-7, [0002]-[0005], [0024]-[0027]). Cain further teaches wherein the arrangement comprises a precombustion chamber wherein the precombustion chamber comprises a burner port and a wall extending from the burner port to a heating chamber port, and the burner assembly is arranged in the burner port of the precombustion chamber, wherein during operation, the burner assembly is arranged to introduce the gaseous fuel, the oxidant gas and/or combustion products thereof into the precombustion chamber (Fig, 5-7, [0024]-[0027]). Additionally, Cain discloses wherein the burner assembly comprises a fuel lance (Fig, 5-7, [0024]-[0027]). However, Cain fails to teach or adequately suggest wherein a nozzle of the fuel lance comprises a plurality of outlet holes, and wherein at least one of the plurality of outlet holes is arranged at an angle relative to a longitudinal axis of the fuel lance, as required by claim 1. Thus, claim 1 is distinct over the teachings of the prior art. Claims 2-15 further limit the subject matter of claim 1 and are thus also distinct over the teachings of the prior art. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to ANTHONY M LIANG whose telephone number is (571)272-0483. The examiner can normally be reached M-F: 9:00am-5:00pm. 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, Jonathan Johnson can be reached at (571)272-1177. 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. /ANTHONY M LIANG/Primary Examiner, Art Unit 1734
Read full office action

Prosecution Timeline

Jun 13, 2024
Application Filed
Jun 25, 2026
Non-Final Rejection mailed — §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

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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
83%
Grant Probability
93%
With Interview (+9.7%)
2y 11m (~10m remaining)
Median Time to Grant
Low
PTA Risk
Based on 675 resolved cases by this examiner. Grant probability derived from career allowance rate.

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