Prosecution Insights
Last updated: August 16, 2026
Application No. 18/570,113

METHOD AND DEVICE FOR MIXING GYPSUM GRANULES DERIVED FROM WASTE GYPSUM BOARD AND GYPSUM SLURRY

Non-Final OA §102
Filed
Dec 14, 2023
Priority
Jun 16, 2021 — JP 2021-100107 +1 more
Examiner
HOWELL, MARC C
Art Unit
Tech Center
Assignee
Tokuyama Corporation
OA Round
1 (Non-Final)
68%
Grant Probability
Favorable
1-2
OA Rounds
9m
Est. Remaining
93%
With Interview

Examiner Intelligence

Grants 68% — above average
68%
Career Allowance Rate
380 granted / 556 resolved
+8.3% vs TC avg
Strong +25% interview lift
Without
With
+24.8%
Interview Lift
resolved cases with interview
Typical timeline
3y 5m
Avg Prosecution
35 currently pending
Career history
582
Total Applications
across all art units

Statute-Specific Performance

§101
0.7%
-39.3% vs TC avg
§103
53.3%
+13.3% vs TC avg
§102
15.1%
-24.9% vs TC avg
§112
28.0%
-12.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 556 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 . Information Disclosure Statement The information disclosure statement (IDS) submitted on 12/14/2023 is in compliance with the provisions of 37 CFR 1.97. Accordingly, the information disclosure statement is being considered by the examiner. Claim Rejections - 35 USC § 102 In the event the determination of the status of the application as subject to AIA 35 U.S.C. 102 and 103 (or as subject to pre-AIA 35 U.S.C. 102 and 103) is incorrect, any correction of the statutory basis (i.e., changing from AIA to pre-AIA ) for the rejection will not be considered a new ground of rejection if the prior art relied upon, and the rationale supporting the rejection, would be the same under either status. 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. Claim 4 is rejected under 35 U.S.C. 102(a)(1) as being anticipated by Scriminger (US 4295744, hereinafter Scriminger). Regarding claim 4, Scriminger discloses mixing device for mixing a slurry, said device comprising a flow path (device 28) and a pipe (elbows 38 and 36) both for the slurry, wherein said flow path is configured to receive the slurry from an inlet of the flow path (at end 18), to receive material from an above position (at segment 26) into the slurry, and, after receiving said material, to flow the slurry to an outlet (at segment 12) of the flow path while an upper surface of the slurry is always exposed to air in the flow path, and wherein said pipe is configured to receive the slurry freely falling from the outlet of the flow path, and to make the slurry impinge on a far side surface of the pipe as viewed from the outlet and fall or make the slurry fall down a center portion of the pipe such that the slurry does not fall along the near side surface of the pipe as viewed from the outlet (the device of Scriminger has all the necessary structure to perform these functions). Although the device of Scriminger does not recite gypsum granules derived from wasted gypsum boards and gypsum slurry and supplying the slurry after mixing to a deposition tank of dihydrate gypsum, these are considered to be the material worked upon by the apparatus and an intended use of the apparatus, both of which are not germane to the issue of patentability. See MPEP 2114 and 2115. Further, the slurry impinging on the far side surface of the pipe appears to be a method of operation of the device that does not affect its structure. The recited impinging of the slurry could be achieved in any bent pipe depending on the speed at which the slurry is introduced. As held in In re Casey, 370 F.2d 576, 152 USPQ 235 (CCPA 1967), “the manner or method in which such machine is utilized is not germane to the issue of patentability of the machine itself.” Nonetheless, the apparatus disclosed in Scriminger contains all the necessary structure to perform the functions stated in claim 4 of the present application, and thus the claim is met. Allowable Subject Matter Claims 1-3 and 5-7 are allowed. Claim 1 is deemed allowable because it recites a method for mixing gypsum granules derived from wasted gypsum boards including feeding a gypsum slurry into a pipe by free fall wherein the gypsum slurry is made to impinge on the far side surface of the pipe while also not falling along the near side surface of the pipe. Conclusion The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. The cited prior art relates to gypsum slurry mixing or mixing materials by moving them through pipes having turns therein. Any inquiry concerning this communication or earlier communications from the examiner should be directed to MARC C HOWELL whose telephone number is (571)272-9834. The examiner can normally be reached Monday-Friday 8-5. 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. /MARC C HOWELL/Primary Examiner, Art Unit 1774
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Prosecution Timeline

Dec 14, 2023
Application Filed
Jul 16, 2026
Non-Final Rejection mailed — §102 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12702246
Systems and Methods for Making Blended Drinks
4y 8m to grant Granted Aug 11, 2026
Patent 12703122
CEMENT PREMIXER, A DEVICE FOR PRODUCING A CONCRETE MIXTURE AND A METHOD FOR PRODUCING A CEMENT SUSPENSION
4y 6m to grant Granted Aug 11, 2026
Patent 12691426
DEVICE FOR INCORPORATION OF PULVERULENT MATERIALS, ESPECIALLY DUST-EXPLOSIVE PULVERULENT MATERIALS, INTO A LIQUID, ESPECIALLY AN INFLAMMABLE LIQUID
4y 1m to grant Granted Jul 28, 2026
Patent 12685979
MANUAL AMALGAMATOR FOR COMPOUNDS
3y 8m to grant Granted Jul 21, 2026
Patent 12686151
SYSTEM FOR THE FORMULATION AND DELIVERY OF MATERIALS TO MOLDING MACHINES
3y 7m to grant Granted Jul 21, 2026
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
68%
Grant Probability
93%
With Interview (+24.8%)
3y 5m (~9m remaining)
Median Time to Grant
Low
PTA Risk
Based on 556 resolved cases by this examiner. Grant probability derived from career allowance rate.

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