Prosecution Insights
Last updated: May 29, 2026
Application No. 18/561,850

METHOD AND SYSTEM FOR FLAME PHOTOMETRIC ONLINE DETECTION OF SULFUR-CONTAINING COMPOUND CONTENT IN NATURAL GAS

Final Rejection §112
Filed
Nov 17, 2023
Priority
May 18, 2021 — CN 202110539372.1 +1 more
Examiner
RAEVIS, ROBERT R
Art Unit
2855
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
Petrochina Company Limited
OA Round
2 (Final)
83%
Grant Probability
Favorable
3-4
OA Rounds
1m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 83% — above average
83%
Career Allowance Rate
1574 granted / 1892 resolved
+15.2% vs TC avg
Strong +16% interview lift
Without
With
+15.7%
Interview Lift
resolved cases with interview
Typical timeline
2y 7m
Avg Prosecution
52 currently pending
Career history
1935
Total Applications
across all art units

Statute-Specific Performance

§101
1.8%
-38.2% vs TC avg
§103
44.6%
+4.6% vs TC avg
§102
5.7%
-34.3% vs TC avg
§112
40.3%
+0.3% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1892 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 . Claims 1-2,4,6-7,9,11-18,20-23,25,27 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. As to claims 1, it’s not clear how one “chromatographic column and comprises a boiling point column 40 and a sulfur column 41, especially as there is a valve in-between the boiling and sulfur columns. Is the valve in Figure 4 part of the chromatographic column too? How is the “chromatographic column” defined for purposes of this application? Note that the chromatographic system includes that valve (per claim 13), so maybe it is the - - chromatograph column system - - that includes the boiling and sulfur columns. As to REMARKS, consider: As to the Paragraph I. ii of p. 13; claim 1 is an apparatus claim. The phrase calls one column comprising 2 different columns that are not connected together. Tagging structure “generic” as a means to overcome claim confusion cannot serve to overcome 35 USC 112(b) is this instance. Please reconsider the rejection. The prior art does not teach the combination of the two boiling point and sulfur columns in combination with remaining claim limitations of claim 1. 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 ROBERT R RAEVIS whose telephone number is (571)272-2204. The examiner can normally be reached on Mon to Friday from 8am to 4pm. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Kristina DeHerrera, can be reached at telephone number 303-297-4237. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of an application may be obtained from Patent Center. Status information for published applications may be obtained from Patent Center. Status information for unpublished applications is available through Patent Center to authorized users only. Should you have questions about access to the USPTO patent electronic filing system, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). Examiner interviews are available via a variety of formats. See MPEP § 713.01. To schedule an interview, applicant is encouraged to use the USPTO Automated Interview Request (AIR) Form at https://www.uspto.gov/InterviewPractice. /ROBERT R RAEVIS/Primary Examiner, Art Unit 2855
Read full office action

Prosecution Timeline

Nov 17, 2023
Application Filed
Jan 23, 2026
Non-Final Rejection mailed — §112
Apr 23, 2026
Response Filed
May 06, 2026
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

3-4
Expected OA Rounds
83%
Grant Probability
99%
With Interview (+15.7%)
2y 7m (~1m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 1892 resolved cases by this examiner. Grant probability derived from career allowance rate.

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