Prosecution Insights
Last updated: April 19, 2026
Application No. 18/868,634

BLASTHOLE STEMMING BASED ON FORMALDEHYDE RESINS, SYSTEM AND CHARGING METHOD

Non-Final OA §103§112
Filed
Nov 22, 2024
Examiner
ELDRED, JOHN W
Art Unit
3641
Tech Center
3600 — Transportation & Electronic Commerce
Assignee
Oxiquim S A
OA Round
1 (Non-Final)
77%
Grant Probability
Favorable
1-2
OA Rounds
2y 3m
To Grant
85%
With Interview

Examiner Intelligence

Grants 77% — above average
77%
Career Allow Rate
767 granted / 992 resolved
+25.3% vs TC avg
Moderate +8% lift
Without
With
+7.8%
Interview Lift
resolved cases with interview
Typical timeline
2y 3m
Avg Prosecution
22 currently pending
Career history
1014
Total Applications
across all art units

Statute-Specific Performance

§101
0.7%
-39.3% vs TC avg
§103
44.1%
+4.1% vs TC avg
§102
14.8%
-25.2% vs TC avg
§112
15.7%
-24.3% vs TC avg
Black line = Tech Center average estimate • Based on career data from 992 resolved cases

Office Action

§103 §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 . 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 21-35 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. In claim 21, line 3, “catalyst on an explosive separated by a layer of drill cutting” is vague and indefinite. The claimed structure is unclear since it is not clear what is separated by the layer of drill cutting. If the layer of drill cutting is supposed to be between the catalyst and the explosive, it is not clear how the catalyst could be “on” the explosive. In claim 21, line 8, “and their derivatives” is vague and indefinite. This is such a broad term that the metes and bounds of the limitation is not clear. If all forms of “derivatives” are considered, there is an almost infinite number of possibilities, many of which have probably not even been discovered yet. Also, it is not clear if this limitation is referring only to the immediate item in the list or all items in the list. In claim 21, line 9, “or based on …” is vague and indefinite. It is not clear what limitations would be placed on an element which is merely “based on” cross-linking agent catalysts”. The following is a quotation of 35 U.S.C. 103 which forms the basis for all obviousness rejections set forth in this Office action: A patent for a claimed invention may not be obtained, notwithstanding that the claimed invention is not identically disclosed as set forth in section 102, if the differences between the claimed invention and the prior art are such that the claimed invention as a whole would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains. Patentability shall not be negated by the manner in which the invention was made. Claims 21-35 are rejected under 35 U.S.C. 103 as being unpatentable over WO86/00660. WO86/00660 discloses a method and apparatus comprising most elements of the claimed system of mining blast hole plugs including loading a bast hole with a bi-component mixture of a formaldehyde-based resin-catalyst and an explosive; where the bi-component mixture forms a foam in situ and is formed from one of the listed formaldehyde resins (page 3, line 31) contained in a first pool 3, and a second acidic, basic, or cross-linking agent catalyst (page 4) formed from the listed elements and held in a second pool 4; and setting off the explosion (page 7, line 16). WO86/00660 fails to disclose the particular claimed parameters. However, to have the specific parameters is considered to be obvious engineering and user desired parameters to provide desired results. This is especially believed to be true in view of the use of known materials and not to be an invention of the chemicals per se. To have the claimed parameters is considered to have been obvious to one having ordinary skill in the art at the time of the application’s filing. Any inquiry concerning this communication or earlier communications from the examiner should be directed to J. WOODROW ELDRED whose telephone number is (571)272-6901. The examiner can normally be reached M-F 9:00-5:30. 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, Troy Chambers can be reached at 571-272-6874. 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. /J. Woodrow Eldred/Primary Examiner, Art Unit 3641 JWE
Read full office action

Prosecution Timeline

Nov 22, 2024
Application Filed
Oct 03, 2025
Response after Non-Final Action
Jan 08, 2026
Non-Final Rejection — §103, §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
77%
Grant Probability
85%
With Interview (+7.8%)
2y 3m
Median Time to Grant
Low
PTA Risk
Based on 992 resolved cases by this examiner. Grant probability derived from career allow rate.

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