Prosecution Insights
Last updated: April 19, 2026
Application No. 18/587,678

SYSTEM AND METHOD FOR DESULFURIZATION OF HYDROCARBON FUELS

Non-Final OA §102
Filed
Feb 26, 2024
Examiner
SEIFU, LESSANEWORK T
Art Unit
1774
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Alternative Environmental Technologies Sulfex Corp.
OA Round
1 (Non-Final)
79%
Grant Probability
Favorable
1-2
OA Rounds
2y 5m
To Grant
79%
With Interview

Examiner Intelligence

Grants 79% — above average
79%
Career Allow Rate
832 granted / 1049 resolved
+14.3% vs TC avg
Minimal +0% lift
Without
With
+0.0%
Interview Lift
resolved cases with interview
Typical timeline
2y 5m
Avg Prosecution
35 currently pending
Career history
1084
Total Applications
across all art units

Statute-Specific Performance

§101
0.6%
-39.4% vs TC avg
§103
36.0%
-4.0% vs TC avg
§102
27.4%
-12.6% vs TC avg
§112
29.0%
-11.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1049 resolved cases

Office Action

§102
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 Applicant’s election without traverse of Group II (claims 17-20) in the reply filed on 5 January 2026 is acknowledged. Drawings The drawings are objected to as failing to comply with 37 CFR 1.84(p)(5) because they do not include the following reference sign(s) mentioned in the description: 150, 122 (Specification, paras. [0058], [0062]). Corrected drawing sheets in compliance with 37 CFR 1.121(d) are required in reply to the Office action to avoid abandonment of the application. Any amended replacement drawing sheet should include all of the figures appearing on the immediate prior version of the sheet, even if only one figure is being amended. Each drawing sheet submitted after the filing date of an application must be labeled in the top margin as either “Replacement Sheet” or “New Sheet” pursuant to 37 CFR 1.121(d). If the changes are not accepted by the examiner, the applicant will be notified and informed of any required corrective action in the next Office action. The objection to the drawings will not be held in abeyance. Claim Rejections - 35 USC § 102 The following is a quotation of the appropriate paragraphs of 35 U.S.C. 102 that form the basis for the rejections under this section made in this Office action: A person shall be entitled to a patent unless – (a)(1) the claimed invention was patented, described in a printed publication, or in public use, on sale, or otherwise available to the public before the effective filing date of the claimed invention. Claims 17-20 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Poole (US 2,077,057). Regarding claim 17, the reference Poole teaches a method of hydrocarbon desulfurization (see page 1, left column, lines 1-31) comprising: - providing a plurality of cells (S1-S6) including a lower cell portion and an upper cell portion, the cells defining an uppermost cell (S1) and a lowermost cell (S2) (see page 4, left column, lines 65-74; Fig. 3); - directing reagent (44) in a downward from the uppermost cell (S1) to the lowermost cell (S6) (see page 4, right column, lines 18-30; Fig. 3); - maintaining at least some reagent in the lower cell portion or each of the uppermost and lowermost cell (S1-S6) (see page 4, right column, lines 42-52; Fig. 3); - introducing fuel (45) to the lower cell portion of the lowermost cell (S6) (see page 4, right column, lines 18-30; Fig. 3); - mixing fuel with reagent in the lower cell portion of the lowermost cell (S6) (see page 4, right column, lines 21-24; Fig. 3); - directing fuel into the upper cell portion of the lowermost cell (S6) (see page 4, right column, lines 42-52; Fig. 3); - directing fuel into the lower cell portion of the uppermost cell (S1) (see page 4, right column, lines 31-41; Fig. 3); - mixing fuel with reagent in the lower cell portion of the uppermost cell (S1) (see page 4, right column, lines 42-52; Fig. 3); - directing fuel into the upper cell portion of the uppermost cell (S1) (see page 4, right column, lines 31-41; Fig. 3); - removing fuel at or near an upper end of the upper cell portion of the uppermost cell (see page 4, right column, lines 31-41; Fig. 3); - overflowing reagent in the lower cell portion of the uppermost cell (S1) into the upper cell portion of the lowermost cell (S6) (see page 4, right column, lines 42-52; Fig. 3); - overflowing reagent in the lower cell portion of the lowermost cell (S6) (see page 4, right column, lines 42-52; Fig. 3); and - removing the reagent that has overflowed from the lower cell portion of the lowermost cell (S6) (see page 4, right column, lines 52-58; Fig. 3). Regarding claim 18, the reference Poole discloses the method, wherein a plurality of central cells (S2-S5) is positioned between the uppermost cell (S1) and the lowermost cell (S6), with the reagent traveling from the uppermost cell to the lowermost cell sequentially, and the fuel traveling from the lowermost cell to the uppermost cell sequentially (see page 4, right column, lines 18-41; Fig. 3). Regarding claim 19, the reference Poole teaches the method, wherein the reagent travels from the uppermost cell to the lowermost cell by way of gravity (see page 4, right column, lines 42-58; Fig. 3). Regarding claim 20, the reference Poole teaches the method, wherein the plurality of cells define a reaction column that is vertically oriented (see page 4, left column, 65-74; Fig. 3). Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to Lessanework T Seifu whose telephone number is (571)270-3153. The examiner can normally be reached M-T 9:00 am - 6:30 pm; F 9:00 am - 1:00 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, Claire Wang can be reached at 571-270-1051. 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. /LESSANEWORK SEIFU/Primary Examiner, Art Unit 1774
Read full office action

Prosecution Timeline

Feb 26, 2024
Application Filed
Mar 03, 2026
Non-Final Rejection — §102 (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
79%
Grant Probability
79%
With Interview (+0.0%)
2y 5m
Median Time to Grant
Low
PTA Risk
Based on 1049 resolved cases by this examiner. Grant probability derived from career allow rate.

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