Prosecution Insights
Last updated: May 28, 2026
Application No. 18/865,203

CONTROLLING DIFFUSION OF A WAKE GENERATED BY A WIND TURBINE

Non-Final OA §112
Filed
Nov 12, 2024
Priority
May 13, 2022 — GB 2207033.8 +1 more
Examiner
CHRISTENSEN, DANIELLE M
Art Unit
3745
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
Equinor Energy AS
OA Round
1 (Non-Final)
79%
Grant Probability
Favorable
1-2
OA Rounds
1y 2m
Est. Remaining
90%
With Interview

Examiner Intelligence

Grants 79% — above average
79%
Career Allowance Rate
502 granted / 632 resolved
+9.4% vs TC avg
Moderate +11% lift
Without
With
+11.0%
Interview Lift
resolved cases with interview
Typical timeline
2y 9m
Avg Prosecution
14 currently pending
Career history
645
Total Applications
across all art units

Statute-Specific Performance

§101
0.5%
-39.5% vs TC avg
§103
71.2%
+31.2% vs TC avg
§102
8.4%
-31.6% vs TC avg
§112
17.0%
-23.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 632 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 39 and 42 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. Regarding claim 39, the term "preferably" renders the claim indefinite because it is unclear whether the limitation(s) following the term are part of the claimed invention. See MPEP § 2173.05(d). Regarding claim 42, the phrase "such as" renders the claim indefinite because it is unclear whether the limitations following the phrase are part of the claimed invention. See MPEP § 2173.05(d). Allowable Subject Matter Claims 26-38, 40-41, and 43-45 are allowed. Claims 39 and 42 would be allowable if rewritten to overcome the rejection(s) under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), 2nd paragraph, set forth in this Office action and to include all of the limitations of the base claim and any intervening claims. The following is a statement of reasons for the indication of allowable subject matter: Regarding claim 26: Closest prior art: Knauer (US 10,975,837) Knauer discloses a method of controlling diffusion of a wake generated by a horizontal axis wind turbine, wherein the wind turbine comprises a rotor having a hub and a plurality of rotor blades mounted to the hub, wherein each rotor blade has a radially-outer, energy-extraction portion and a radially-inner, ventilation portion, and wherein the radially-inner ventilation portion is shaped to, in use, ventilate a central area of the wake by extracting reduced levels of kinetic energy from the wind compared to the radially-outer energy extraction portion. The closest prior art fails to disclose or suggest adjusting the tip speed ratio of the rotor so as to modify turbulent mixing within the wake. Claims 27-38 and 40 are allowed to for depending upon claim 26. Regarding claim 41: Closest prior art: Post et al. (US 11,639,710; hereinafter Post) and Knauer (US 10,975,837) Post discloses a method of optimizing power production of a wind farm comprising a plurality of horizontal axis wind turbines, the method comprising: determining the effect that the wake of each wind turbine has on the efficiency of the wind farm. Knauer teaches the wind turbines comprising a rotor having a plurality of rotor blades, each rotor blade having a radially-outer, energy-extraction portion and a radially-inner, ventilation portion, wherein the radially-inner ventilation portion is shaped to, in use, ventilate a central area of the wake by extracting reduced levels of kinetic energy from the wind compared to the radially-outer energy extraction portion. The closest prior art fails to disclose or suggest adjusting the tip speed ratio of the rotor of at least one of the wind turbines to modify turbulent mixing within its wake and increase the efficiency of the wind farm. Claims 43-45 are allowed to for depending upon claim 41. Pertinent Prior Art The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. Christensen et al. (US 2025/0382944) discloses a means for controlling a wind turbine farm in which how the wake of an upstream wind turbine affects a downstream wind turbine is taken into account when controlling the wind turbines. Contact Information Any inquiry concerning this communication or earlier communications from the examiner should be directed to DANIELLE M CHRISTENSEN whose telephone number is (571)270-3275. The examiner can normally be reached M-F 9-5 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, Courtney Heinle can be reached at 571-270-3508. 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. /Danielle M. Christensen/Examiner, Art Unit 3745
Read full office action

Prosecution Timeline

Nov 12, 2024
Application Filed
Feb 19, 2026
Non-Final Rejection mailed — §112
Apr 30, 2026
Response Filed

Precedent Cases

Applications granted by this same examiner with similar technology

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EXHAUST FAN
2y 2m to grant Granted May 19, 2026
Patent 12623761
PROPELLER WITH FOLDING BLADES AND PROPULSION SYSTEM
1y 7m to grant Granted May 12, 2026
Patent 12601352
HIGH PRESSURE MAGNETIC COUPLING SHROUDS AND METHODS OF PRODUCING THE SAME
3y 10m to grant Granted Apr 14, 2026
Patent 12601301
SEPARATORS FOR USE WITH GAS TURBINE ENGINES
1y 3m to grant Granted Apr 14, 2026
Patent 12595742
TURBINE COMPONENT WITH A THIN INTERIOR PARTITION
3y 6m to grant Granted Apr 07, 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
79%
Grant Probability
90%
With Interview (+11.0%)
2y 9m (~1y 2m remaining)
Median Time to Grant
Low
PTA Risk
Based on 632 resolved cases by this examiner. Grant probability derived from career allowance rate.

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