Prosecution Insights
Last updated: October 02, 2026
Application No. 18/283,774

Gas atomization of molten steel

Non-Final OA §112§DOUBLEPATENT
Filed
Sep 22, 2023
Priority
Apr 06, 2021 — nonprovisional of PCTIB2021052836
Examiner
MORALES, RICARDO D
Art Unit
1738
Tech Center
1700 — Chemical & Materials Engineering
Assignee
ArcelorMittal
OA Round
1 (Non-Final)
81%
Grant Probability
Favorable
1-2
OA Rounds
0m
Est. Remaining
98%
With Interview

Examiner Intelligence

Grants 81% — above average
81%
Career Allowance Rate
376 granted / 463 resolved
+16.2% vs TC avg
Strong +17% interview lift
Without
With
+17.1%
Interview Lift
resolved cases with interview
Typical timeline
2y 8m
Avg Prosecution
28 currently pending
Career history
480
Total Applications
across all art units

Statute-Specific Performance

§101
0.5%
-39.5% vs TC avg
§103
57.7%
+17.7% vs TC avg
§102
21.0%
-19.0% vs TC avg
§112
19.0%
-21.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 463 resolved cases

Office Action

§112 §DOUBLEPATENT
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 . Election/Restrictions Claims 44-48 are withdrawn from further consideration pursuant to 37 CFR 1.142(b), as being drawn to a nonelected invention, there being no allowable generic or linking claim. Applicant timely traversed the restriction (election) requirement in the reply filed on 06/12/2026. Applicant's election with traverse of Claims 25-43 in the reply filed on 06/12/2026 is acknowledged. The traversal is on the ground(s) that 2013/0180360 does not disclose the claimed S, N, O or N amounts in molten steel and molten iron S composition differs from the molten steel amounts and the molten steel before provided to the turdish is 0.1-0.2%, outside of the claimed range. This is not found persuasive because Claim 4 is an optional embodiment, [0031] teaches a molten iron content of 0.005-0.1% S, overlapping with the claimed range, the converter than refines the S content to less than 0.005% [0033], reading on the claimed range. The requirement is still deemed proper and is therefore made FINAL. 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 25-43 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 25 recites the limitation "to the one of a desired composition of a steel powder" in Line 7. There is insufficient antecedent basis for this limitation in the claim. Claims 26-43 are rejected from their dependency on claim 25. Double Patenting Claim 25-26 is provisionally rejected on the ground of nonstatutory double patenting as being unpatentable over claim 24 and 25 of copending Application No. 18/287106 in view of Hwang (US20130152740A1). The difference between the claims of the copending application and the present application is that the ‘106 application requires refining in a vacuum degasser, whereas the present application requires refining in a converter. However, Hwang teaches molten iron may be obtained from converter steelmaking and electric arc furnace is generally refined by ladle furnace or vacuum arc degasses to reduce the contents of P, S, O and N [0004]. This is a provisional nonstatutory double patenting rejection. Any inquiry concerning this communication or earlier communications from the examiner should be directed to RICARDO D MORALES whose telephone number is (571)272-6691. The examiner can normally be reached Monday-Thursday 9 am- 4 pm. 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, Sally Merkling can be reached at 5712726297. 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. /RICARDO D MORALES/Primary Examiner, Art Unit 1738
Read full office action

Prosecution Timeline

Sep 22, 2023
Application Filed
Aug 18, 2026
Non-Final Rejection mailed — §112, §DOUBLEPATENT (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12747488
CARBIDE REFINING METHOD OF HIGH-CARBON HIGH-ALLOY STEEL
3y 0m to grant Granted Sep 29, 2026
Patent 12746596
SYSTEMS AND METHODS FOR SYNTHESIS OF SPHEROIDIZED METAL POWDERS
2y 10m to grant Granted Sep 29, 2026
Patent 12741314
TWO-STEP THERMAL TREATMENT OF NICKEL-CONTAINING SULFIDES FOR THE PRODUCTION OF FERRONICKEL
3y 3m to grant Granted Sep 22, 2026
Patent 12744166
COMPOSITE MATERIAL FOR ELECTRICAL CONTACTS AND METHOD OF PRODUCING SAME
3y 0m to grant Granted Sep 22, 2026
Patent 12728457
ZigZag Flow Reactor for Heterogenous Thermochemical Reduction
2y 10m to grant Granted Sep 08, 2026
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
81%
Grant Probability
98%
With Interview (+17.1%)
2y 8m (~0m remaining)
Median Time to Grant
Low
PTA Risk
Based on 463 resolved cases by this examiner. Grant probability derived from career allowance rate.

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