Prosecution Insights
Last updated: August 15, 2026
Application No. 18/490,858

ROTOR FOR AN ECCENTRIC SCREW PUMP AND METHOD FOR THE MANUFACTURE THEREOF

Non-Final OA §112
Filed
Oct 20, 2023
Priority
Jul 18, 2018 — DE 20 2018 104 142.8 +2 more
Examiner
SINGH, DAPINDER
Art Unit
3746
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
Vogelsang GmbH & Co. Kg
OA Round
2 (Non-Final)
82%
Grant Probability
Favorable
2-3
OA Rounds
0m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 82% — above average
82%
Career Allowance Rate
731 granted / 886 resolved
+12.5% vs TC avg
Strong +19% interview lift
Without
With
+18.7%
Interview Lift
resolved cases with interview
Fast prosecutor
2y 2m
Avg Prosecution
21 currently pending
Career history
906
Total Applications
across all art units

Statute-Specific Performance

§101
4.2%
-35.8% vs TC avg
§103
37.5%
-2.5% vs TC avg
§102
31.8%
-8.2% vs TC avg
§112
22.4%
-17.6% vs TC avg
Black line = Tech Center average estimate • Based on career data from 886 resolved cases

Office Action

§112
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 . 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 1-13 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. Claim 1 recites “a central worm axis” in line 2 first and then in line 9. As such, it cannot be ascertained whether they are the same axis of if they are different. If they are the same, the “a central worm axis” in line 9 should be changed to --the central worm axis --. If they are not the same, then they should be named differently Claim 1 recites “a helical geometry” in lines 1-2 first and then in line 7. As such, it cannot be ascertained whether they are the same helical geometry of if they are different. If they are the same, the “a helical geometry” in line 7 should be changed to --the helical geometry--. If they are not the same, then they should be named differently. Claim 1 recites the limitations "the distance" in line 9, “the axial direction” in line 17. There is insufficient antecedent basis for these limitations in the claim. Claim 1 also recites “an axial direction” in line 20. It cannot be ascertained whether this is the same axial direction as the one recited in line 17 or if it is different. If it is the same, the limitation should read --the axial direction-- in line 20. If they are different, they should be named differently. Claim 1 further recites “the first end is greater than at the second end of the rotor” in lines 18-19. It cannot be ascertained from the claim what of the first end is greater than that of second end. Clarification is required. Claim 6 recites “a manufactured rotor” in line 2. However, it cannot be ascertained from the claim whether it is the rotor as claimed in claim 1 or if it is different. Clarification is required. Claim 6 further recites “an outer geometry of the rotor” in line 8. It cannot be ascertained whether it is the same “an enveloping outer geometry of the rotor” as claimed in claim 1 or if it is different. Clarification is required. Additional Subject Matter Even though claims 1-13 are not rejected under prior art, they are rejected under 112 for being indefinite and hence, are not allowable at this time. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to DAPINDER SINGH whose telephone number is (571)270-1774. The examiner can normally be reached Monday to Friday from 8:00 AM to 5:30 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, Mark Laurenzi can be reached at (571) 270-7878. 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. /DAPINDER SINGH/Primary Examiner, Art Unit 3746
Read full office action

Prosecution Timeline

Oct 20, 2023
Application Filed
Dec 15, 2025
Non-Final Rejection mailed — §112
Mar 10, 2026
Response Filed
Jul 13, 2026
Request for Continued Examination
Jul 20, 2026
Response after Non-Final Action
Jul 28, 2026
Non-Final Rejection mailed — §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

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3y 3m to grant Granted Aug 11, 2026
Patent 12692821
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2y 1m to grant Granted Jul 28, 2026
Patent 12692863
SCREW PUMP AND ITS COMPONENTS
1y 7m to grant Granted Jul 28, 2026
Patent 12692809
EXHAUST SYSTEM AND COMPONENTS THEREOF
1y 0m to grant Granted Jul 28, 2026
Patent 12686935
SYSTEMS AND METHODS OF AMMONIA SYNTHESIS
3y 5m 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

2-3
Expected OA Rounds
82%
Grant Probability
99%
With Interview (+18.7%)
2y 2m (~0m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 886 resolved cases by this examiner. Grant probability derived from career allowance rate.

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