Prosecution Insights
Last updated: July 17, 2026
Application No. 18/696,206

HOT-ROLLED FERRITIC STAINLESS STEEL SHEET HAVING EXCELLENT FORMABILITY AND METHOD FOR MANUFACTURING SAME

Non-Final OA §112
Filed
Mar 27, 2024
Priority
Oct 26, 2021 — RE 10-2021-0143703 +1 more
Examiner
LIANG, ANTHONY M
Art Unit
Tech Center
Assignee
POSCO Holdings Inc.
OA Round
1 (Non-Final)
83%
Grant Probability
Favorable
1-2
OA Rounds
7m
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 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 1-3 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. The term “excellent formability” in claims 1-3 is a relative term which renders the claim indefinite. The term “excellent formability” is not defined by the claim, the specification does not provide a standard for ascertaining the requisite degree, and one of ordinary skill in the art would not be reasonably apprised of the scope of the invention. It is unclear what degrees of formability would be and would not be considered “excellent formability,” which renders the metes and bounds of the claims indefinite. Allowable Subject Matter Claims 1-3 would be allowable if rewritten or amended 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. The following is a statement of reasons for the indication of allowable subject matter: Regarding claims 1 and 3, the prior art fails to disclose the hot-rolled ferritic steel sheet and method of manufacturing the hot-rolled ferritic stainless steel sheet as recited. In particular, the closest prior art, Bi et al. (CN 101768702), hereinafter “Bi,” wherein an English machine translation is used and cited herein, teaches a hot-rolled ferritic stainless steel having a chemical composition comprising, by weight, C≤0.015%, Cr: 16.0-18.0, Ti: 0.20-0.30%, Nb: 0.20-0.40%, Ni≤0.3%, Mn: 0.20-0.70%, Cu≤0.2%, Si: 0.20-0.50%, N≤0.015%, Al≤0.06%, and a balance of Fe and inevitable impurities (Abstract, [0025], [0030], [0047]), which overlaps with the instantly claimed chemical composition, with the exception of Cr. Bi further teaches an R-value ≥1.35 ([0051]) and wherein the examples have TS/YS ranging from 1.71-1.99 (Table 4). However, Bi teaches wherein the steel sheet has a Cr content of 16.0-18.0%, which is outside of the range of 10.0-14.0% required by claims 1 and 3. Furthermore, Bi fails to disclose or fairly suggest wherein the steel sheet has an R-bar value of 1.08 or more, as required by claims 1 and 3. Thus, claims 1 and 3 are distinct over the teachings of the prior art. Claim 2 further limits the subject matter of claim 1 and is 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
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Prosecution Timeline

Mar 27, 2024
Application Filed
Jun 24, 2026
Non-Final Rejection mailed — §112 (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
83%
Grant Probability
93%
With Interview (+9.7%)
2y 11m (~7m 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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