Prosecution Insights
Last updated: July 17, 2026
Application No. 18/881,460

TIDAL TURBINE

Non-Final OA §103§112
Filed
Jan 06, 2025
Priority
Jul 07, 2022 — GB 2210005.1 +1 more
Examiner
PETERS, BRIAN O
Art Unit
3711
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
Tidal Technologies Limited
OA Round
3 (Non-Final)
73%
Grant Probability
Favorable
3-4
OA Rounds
1y 3m
Est. Remaining
89%
With Interview

Examiner Intelligence

Grants 73% — above average
73%
Career Allowance Rate
463 granted / 633 resolved
+3.1% vs TC avg
Strong +16% interview lift
Without
With
+15.7%
Interview Lift
resolved cases with interview
Typical timeline
2y 10m
Avg Prosecution
36 currently pending
Career history
663
Total Applications
across all art units

Statute-Specific Performance

§101
0.9%
-39.1% vs TC avg
§103
78.8%
+38.8% vs TC avg
§102
10.8%
-29.2% vs TC avg
§112
8.8%
-31.2% vs TC avg
Black line = Tech Center average estimate • Based on career data from 633 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 . DETAILED ACTION Response to Arguments Applicant's arguments filed 3/23/2026 have been fully considered and they are persuasive. However, upon further consideration, a new ground(s) of rejection is made in view of Williams and Fraenkel. For these reasons the arguments are not persuasive. 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 11 is 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 11 is unclear for reciting the relative term “easy”. The term is not defined. Claim Rejections - 35 USC § 103 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. Claim(s) 1, 3, 7, 12 and 17-18 are rejected under 35 U.S.C. 103 as being unpatentable over Williams GB2592567 in view of Fraenkel US 20100183377. Regarding claim 1, Williams discloses a tidal turbine assembly (Figs. 4-5) comprising: a first turbine (one of the three rotors R), comprising a first plurality of foils, that is configured, in use, to rotate around an upright axis that is upright relative to the sea bed (Fig. 4); and a second turbine (a different one of the three rotors R), comprising a second plurality of foils, that is configured, in use, to rotate around an upright axis that is upright relative to the sea bed (Fig. 4); wherein the first turbine and the second turbine are coupled by a support beam (28) that is configured to be, in use, above the sea level (L); and wherein the support beam is coupled to a support column (30) to support the support beam, in use, above the sea level (Fig. 4), and wherein the support column (30) is connected to a gravity base (26) to support the support column in an upright orientation relative to the sea bed in use (Fig. 5). However, it does not teach that the gravity base is weighted and immovable relative to the sea bed in response to natural force solely by its own weight. Fraenkel teaches a gravity foundation for underwater turbines comprising a gravity base weighted and immovable relative to the sea bed in response to natural force solely by its own weight ([0009]). Since both Williams and Fraenkel teach bases for underwater turbines it would have been obvious to one of ordinary skill in the art, before the effective filing date of the claimed invention to replace the base as taught by Williams by simply substituting the base of Fraenkel in order to mount the turbine to the sea floor in an immovable manner. Regarding claim 3, Williams further discloses that each turbine comprises a turbine shaft wherein each turbine rotates about a turbine axis (Fig. 4), wherein the turbine shaft is coupled to the support beam at one end and to the gravity base at the other end (Fig. 4). Regarding claim 7, Williams further discloses that a respective power generating portion (31) mounted to the support beam proximate to each of the respective first and second turbines (Fig. 5). Regarding claim 12, Williams further discloses that the first turbine is configured to rotate about an axis parallel to the axis about which the second turbine rotates (Fig. 4). Regarding claim 17, Williams further discloses that the support column (30) supports the support beam (28) between the first and second turbines such that the first and second turbines are on either side of the support column (Fig. 5). Regarding claim 18, Williams further discloses a pair of support columns (30) for supporting the support beam, in use, above the sea level (Fig. 4). Claim(s) 4 is rejected under 35 U.S.C. 103 as being unpatentable over Williams GB2592567 and Fraenkel US 20100183377 and further in view of Kay US 20220316441. Regarding claim 4, Williams does not teach that each turbine comprises a turbine shaft wherein each turbine rotates about a turbine axis, wherein the turbine shaft is only coupled to the support beam. Kay teaches a tidal turbine assembly wherein the turbine (10) rotates about an axis (X) and the turbine shaft (22a) is only coupled to a support beam (13, Fig. 7). Because both Williams and Kay teach means to connect an underwater rotor to a generator, it would have been obvious to one skilled in the art to replace the means as taught by Williams by simply substituting in the means as taught by Kay in order to achieve the predictable result of rotating the turbine shaft and generate power. See KSR Int'l Co. v. Teleflex, Inc., 550 U.S. 398 (2007), MPEP 2143 (I)(B). Claim(s) 5-6 are rejected under 35 U.S.C. 103 as being unpatentable over Williams GB2592567 and Fraenkel US 20100183377 and further in view of Gehring US 7215036. Regarding claim 5, Williams does not teach that the support column (30) is provided by a monopile. Williams does teaches using “more than one turbine R” ([0020]) but does not require the three shown in the figures. Using only two turbines is within the teachings of Williams. Looking at Fig. 5 and removing a single rotor such that only two remain shows two support columns (30). Gehring teaches a tidal turbine assembly comprising rotors supported between an upper frame and lower frame and supported by a monopile (section of 13 between upper and lower frame 12). Doing so would reduce the number of components simplifying the assembly and reducing manufacturing costs. Thus, it would have been obvious to one of ordinary skill in the art, before the effective filing date of the claimed invention to modify the support column as taught by Williams by utilizing a monopile as taught by Gehring in order to reduce the number of components, simplify the assembly, and reduce manufacturing costs. Regarding claim 6, Gehring further teaches that the tidal turbine assembly is coupled to a monopile of a wind turbine (Fig. 9a) in order to increase the electricity sent to the power grid (col. 6 ln. 19-41). Thus, it would have been obvious to one of ordinary skill in the art, before the effective filing date of the claimed invention, to modify the tidal turbine assembly as taught by the combination by coupling it to a monopile of a wind turbine in order to increase the electricity sent to the power grid. Allowable Subject Matter Claims 8-11 are objected to as being dependent upon a rejected base claim, but would be allowable if rewritten in independent form including 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: Claim 8 is allowable for the foil support being configured to be movable up and down relative to the turbine shaft. Moore teaches that the entirety of the rotor with its shaft are removed from the water. There is no independent movement of the foil support causing the movement out of the water. Claim 11 is allowable for each foil of the first and second plurality of foils is weighted at a distal end proximate to the sea bed in use with positive buoyancy to float vertically to allow easy connection and replacement. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to BRIAN O PETERS whose telephone number is (571)272-2662. The examiner can normally be reached Tue-Sat, 12:00pm-10pm EST. 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, Eugene Kim can be reached at (571) 272-4463. 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. /BRIAN O PETERS/Primary Examiner, Art Unit 3745
Read full office action

Prosecution Timeline

Jan 06, 2025
Application Filed
Oct 15, 2025
Non-Final Rejection mailed — §103, §112
Dec 31, 2025
Response Filed
Jan 21, 2026
Final Rejection mailed — §103, §112
Mar 23, 2026
Response after Non-Final Action
Apr 20, 2026
Request for Continued Examination
Apr 22, 2026
Response after Non-Final Action
Jun 09, 2026
Non-Final Rejection mailed — §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

3-4
Expected OA Rounds
73%
Grant Probability
89%
With Interview (+15.7%)
2y 10m (~1y 3m remaining)
Median Time to Grant
High
PTA Risk
Based on 633 resolved cases by this examiner. Grant probability derived from career allowance rate.

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