Prosecution Insights
Last updated: April 19, 2026
Application No. 18/022,389

DRAINAGE TREATMENT SYSTEM AND DRAINAGE TREATMENT METHOD

Final Rejection §112
Filed
Feb 21, 2023
Examiner
CHIU, TAK LIANG
Art Unit
1777
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Hitachi, Ltd.
OA Round
2 (Final)
53%
Grant Probability
Moderate
3-4
OA Rounds
3y 8m
To Grant
90%
With Interview

Examiner Intelligence

Grants 53% of resolved cases
53%
Career Allow Rate
17 granted / 32 resolved
-11.9% vs TC avg
Strong +37% interview lift
Without
With
+37.2%
Interview Lift
resolved cases with interview
Typical timeline
3y 8m
Avg Prosecution
37 currently pending
Career history
69
Total Applications
across all art units

Statute-Specific Performance

§101
1.4%
-38.6% vs TC avg
§103
42.3%
+2.3% vs TC avg
§102
17.6%
-22.4% vs TC avg
§112
37.1%
-2.9% vs TC avg
Black line = Tech Center average estimate • Based on career data from 32 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 . Priority Applicant’s claim for the benefit of a prior-filed application (is 371 of PCT/JP2020/044781, filed on 02 December 2020) under 35 U.S.C. 119(e) or under 35 U.S.C. 120, 121, 365(c), or 386(c) is acknowledged. Claim Objections Claim 3 objected to because of the following informalities: The phrase “prediction of the discharged amount” should be corrected to read “prediction of the amount of discharged drainage from each factory” to provide clarity and consistency. Claim 5 objected to because of the following informalities: The phrase “a contamination concentration[[,]] of the liquid regenerant, detected by” should be corrected to read “a contamination concentration of the liquid regenerant, detected by” to correct punctuation.. Claim 9 objected to because of the following informalities: The phrase “acquiring an operating plan information” should be corrected to read “acquiring operating plan information” to correct grammar. The phrase “impurities adsorbed to a solid detergent” should be corrected to read “impurities adsorbed by a solid detergent” to improve clarity. Appropriate correction is required. Claim Rejections - 35 USC § 112 The following is a quotation of 35 U.S.C. 112(d): (d) REFERENCE IN DEPENDENT FORMS. —Subject to subsection (e), a claim in dependent form shall contain a reference to a claim previously set forth and then specify a further limitation of the subject matter claimed. A claim in dependent form shall be construed to incorporate by reference all the limitations of the claim to which it refers. Claim 4 rejected under 35 U.S.C. 112(d) or pre-AIA 35 U.S.C. 112, 4th paragraph, as being of improper dependent form for failing to further limit the subject matter of the claim upon which it depends, or for failing to include all the limitations of the claim upon which it depends. Claim 4 recites the limitation “activated carbon”. However, Claim 1 recites only “solid detergent” and does not require activated carbon, and Claim 8 separately recites that the solid detergent is activated carbon. Accordingly, Claim 4 is of improper dependent form due to the abrupt introduction of “activated carbon” without clear linkage to the “solid detergent” of Claim 1. Applicant may cancel the claim(s), amend the claim(s) to place the claim(s) in proper dependent form, rewrite the claim(s) in independent form, or present a sufficient showing that the dependent claim(s) complies with the statutory requirements. Allowable Subject Matter Claim 1–2 and 6–8 are allowed. Claim 4 is rejected under 35 U.S.C. 112(d) as being of improper dependent form. Claims 3 and 5 are objected to as containing minor informalities. The following is a statement of reasons for the indication of allowable subject matter: Applicant’s amendments overcome the previously applied §112(b) and §103 rejections. Upon further consideration and a further search, no prior art has been found that teaches or suggests the claimed subject matter. The claims require acquiring operating plan information from each of a plurality of factories to predict discharged drainage amounts from each factory, and controlling timing of operation based on that prediction, which goes beyond merely accommodating hardware capacity and distinguishes the claimed invention from the prior art of record. Conclusion 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 TAK L. CHIU whose telephone number is (703)756-1059. The examiner can normally be reached M-F: 9:00am - 6:00pm (CST). 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, PREM C. SINGH can be reached at (571)272-6381. 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. /TAK L. CHIU/Examiner, Art Unit 1777 /KRISHNAN S MENON/Primary Examiner, Art Unit 1777
Read full office action

Prosecution Timeline

Feb 21, 2023
Application Filed
Oct 09, 2025
Non-Final Rejection — §112
Dec 08, 2025
Response Filed
Feb 17, 2026
Final Rejection — §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12569862
CENTRIFUGES AND RELATED METHODS OF USE TO DEWATER MATURE (FLUID) FINE TAILINGS
2y 5m to grant Granted Mar 10, 2026
Patent 12478925
OIL/WATER SEPARATION
2y 5m to grant Granted Nov 25, 2025
Patent 12472448
COMPACT HYDROXAMATE-BASED AFFINITY TAGS FOR ARTIFICIALLY TAGGING BIOLOGICAL MACROMOLECULES
2y 5m to grant Granted Nov 18, 2025
Patent 12459835
FLUIDIZED ADSORPTION DEVICE AND FLUIDIZED ADSORPTION METHOD FOR SEWAGE TREATMENT
2y 5m to grant Granted Nov 04, 2025
Patent 12447478
Sand Traps For Use In Oil And Gas Extraction Operations
2y 5m to grant Granted Oct 21, 2025
Study what changed to get past this examiner. Based on 5 most recent grants.

AI Strategy Recommendation

Get an AI-powered prosecution strategy using examiner precedents, rejection analysis, and claim mapping.
Powered by AI — typically takes 5-10 seconds

Prosecution Projections

3-4
Expected OA Rounds
53%
Grant Probability
90%
With Interview (+37.2%)
3y 8m
Median Time to Grant
Moderate
PTA Risk
Based on 32 resolved cases by this examiner. Grant probability derived from career allow rate.

Sign in with your work email

Enter your email to receive a magic link. No password needed.

Personal email addresses (Gmail, Yahoo, etc.) are not accepted.

Free tier: 3 strategy analyses per month