Prosecution Insights
Last updated: April 17, 2026
Application No. 18/446,963

GROUND OR UNGROUND RICE HUSK USED AS FUEL FOR STATIONARY OR ROTARY SILICATE KILNS AS A SUBSTITUTE FOR FOSSIL FUELS

Non-Final OA §112
Filed
Aug 09, 2023
Examiner
LAUX, DAVID J
Art Unit
3762
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
unknown
OA Round
1 (Non-Final)
65%
Grant Probability
Moderate
1-2
OA Rounds
3y 1m
To Grant
93%
With Interview

Examiner Intelligence

Grants 65% of resolved cases
65%
Career Allow Rate
543 granted / 838 resolved
-5.2% vs TC avg
Strong +29% interview lift
Without
With
+28.6%
Interview Lift
resolved cases with interview
Typical timeline
3y 1m
Avg Prosecution
19 currently pending
Career history
857
Total Applications
across all art units

Statute-Specific Performance

§101
0.7%
-39.3% vs TC avg
§103
49.7%
+9.7% vs TC avg
§102
17.4%
-22.6% vs TC avg
§112
25.8%
-14.2% vs TC avg
Black line = Tech Center average estimate • Based on career data from 838 resolved cases

Office Action

§112
DETAILED ACTION Application Status The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA . This action is in response to Applicant’s submission dated 08/09/2023. Claims 1–12 are pending. 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 1–12 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. First, the claim(s) are narrative in form and replete with indefinite language. The claim(s) must be in one sentence form only. The structure which goes to make up the device must be clearly and positively specified. The structure must be organized and correlated in such a manner as to present a complete operative device. Second, the claim is overly vague. The claim initially claims “a ground or unground rice husk used as fuel” but then later goes on to claim “a grinding, classification, and atomization system;” thus, it is not clear whether “ground or unground” refers to a starting point after which the rice husk is ground or whether the grinder and grinding step are optional. Further, the claim includes “the rice husk will be stored in the appropriate silo” but there is no indication as to what type of silo would be “appropriate.” Similarly, the claim states “and when necessary, it will be ground in a grinder,” but there is no indication on when doing so would be “necessary.” Because the claims are replete with errors, examination under §§ 102 & 103 is not possible at this time. However, examiner notes that burning rice husks (hulls) appears to be old and well-known in the art, as evidenced by US 5,010,831 to Halfhide and others indicated in the attached PTO-892. Conclusion The prior art made of record and not relied upon is considered pertinent to applicant's disclosure: see attached PTO-892. Applicant is encouraged to review the cited references prior to submitting a response to this office action. Any inquiry concerning this communication or earlier communications from the examiner should be directed to DAVID J LAUX whose telephone number is (571)270-7619. The examiner can normally be reached 8:30-5:30 M-F. 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, Steven B McAllister can be reached at (571) 272-6785. 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. /DAVID J LAUX/Primary Examiner, Art Unit 3762 March 10, 2026
Read full office action

Prosecution Timeline

Aug 09, 2023
Application Filed
Oct 06, 2023
Response after Non-Final Action
Mar 10, 2026
Non-Final Rejection — §112 (current)

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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
65%
Grant Probability
93%
With Interview (+28.6%)
3y 1m
Median Time to Grant
Low
PTA Risk
Based on 838 resolved cases by this examiner. Grant probability derived from career allow rate.

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