Prosecution Insights
Last updated: April 17, 2026
Application No. 18/928,979

VERTICAL AXIS WIND TURBINE

Final Rejection §103§DP
Filed
Oct 28, 2024
Examiner
NGUYEN, VIET P
Art Unit
2834
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
unknown
OA Round
2 (Final)
61%
Grant Probability
Moderate
3-4
OA Rounds
2y 3m
To Grant
92%
With Interview

Examiner Intelligence

Grants 61% of resolved cases
61%
Career Allow Rate
435 granted / 708 resolved
-6.6% vs TC avg
Strong +30% interview lift
Without
With
+30.5%
Interview Lift
resolved cases with interview
Typical timeline
2y 3m
Avg Prosecution
23 currently pending
Career history
731
Total Applications
across all art units

Statute-Specific Performance

§101
2.1%
-37.9% vs TC avg
§103
53.4%
+13.4% vs TC avg
§102
19.6%
-20.4% vs TC avg
§112
21.3%
-18.7% vs TC avg
Black line = Tech Center average estimate • Based on career data from 708 resolved cases

Office Action

§103 §DP
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 . 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 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. Double Patenting The nonstatutory double patenting rejection is based on a judicially created doctrine grounded in public policy (a policy reflected in the statute) so as to prevent the unjustified or improper timewise extension of the “right to exclude” granted by a patent and to prevent possible harassment by multiple assignees. A nonstatutory double patenting rejection is appropriate where the conflicting claims are not identical, but at least one examined application claim is not patentably distinct from the reference claim(s) because the examined application claim is either anticipated by, or would have been obvious over, the reference claim(s). See, e.g., In re Berg, 140 F.3d 1428, 46 USPQ2d 1226 (Fed. Cir. 1998); In re Goodman, 11 F.3d 1046, 29 USPQ2d 2010 (Fed. Cir. 1993); In re Longi, 759 F.2d 887, 225 USPQ 645 (Fed. Cir. 1985); In re Van Ornum, 686 F.2d 937, 214 USPQ 761 (CCPA 1982); In re Vogel, 422 F.2d 438, 164 USPQ 619 (CCPA 1970); In re Thorington, 418 F.2d 528, 163 USPQ 644 (CCPA 1969). A timely filed terminal disclaimer in compliance with 37 CFR 1.321(c) or 1.321(d) may be used to overcome an actual or provisional rejection based on nonstatutory double patenting provided the reference application or patent either is shown to be commonly owned with the examined application, or claims an invention made as a result of activities undertaken within the scope of a joint research agreement. See MPEP § 717.02 for applications subject to examination under the first inventor to file provisions of the AIA as explained in MPEP § 2159. See MPEP § 2146 et seq. for applications not subject to examination under the first inventor to file provisions of the AIA . A terminal disclaimer must be signed in compliance with 37 CFR 1.321(b). The filing of a terminal disclaimer by itself is not a complete reply to a nonstatutory double patenting (NSDP) rejection. A complete reply requires that the terminal disclaimer be accompanied by a reply requesting reconsideration of the prior Office action. Even where the NSDP rejection is provisional the reply must be complete. See MPEP § 804, subsection I.B.1. For a reply to a non-final Office action, see 37 CFR 1.111(a). For a reply to final Office action, see 37 CFR 1.113(c). A request for reconsideration while not provided for in 37 CFR 1.113(c) may be filed after final for consideration. See MPEP §§ 706.07(e) and 714.13. The USPTO Internet website contains terminal disclaimer forms which may be used. Please visit www.uspto.gov/patent/patents-forms. The actual filing date of the application in which the form is filed determines what form (e.g., PTO/SB/25, PTO/SB/26, PTO/AIA /25, or PTO/AIA /26) should be used. A web-based eTerminal Disclaimer may be filled out completely online using web-screens. An eTerminal Disclaimer that meets all requirements is auto-processed and approved immediately upon submission. For more information about eTerminal Disclaimers, refer to www.uspto.gov/patents/apply/applying-online/eterminal-disclaimer. Claims 1-16 are rejected on the ground of nonstatutory double patenting as being unpatentable over claims 1-17 of U.S. Patent No. 12129827 B2. Although the claims at issue are not identical, they are not patentably distinct from each other because though not verbatim, they claim the same invention as claims 1-17 of the above US Patent. Claim Objections Claims 1 and 13 are objected to because of the following informalities: claims 1 and 13 recite the limitation "the track follower" in the newly amended limitation. There is insufficient antecedent basis for this limitation in the claims. Appropriate correction is required. 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. Claims 1-16 are rejected under 35 U.S.C. 103 as being unpatentable over US 20170051720 A1 to Grigg in view of US 4260328 to Hamel and US 20130045080 A1 to Kirke. Regarding claim 1, Grigg discloses a vertical wind turbine comprising: a central axis (Fig. 1: 20) that extends in a substantially vertical direction; a support framework (27); a fixed central spindle (21) supported by the support framework; a rotor assembly comprising: a hub assembly (at 22) disposed about the central axis; a plurality of blades (26) disposed about the central axis, the plurality of blades physically coupled to rotate together about the central axis, each blade having a blade axis (at 9) about which it rotates; and a plurality of spaced apart arm assemblies (15) connecting the plurality of blades to the hub assembly; an angle adjustment mechanism that is configured to adjust an angle formed between each blade and a radius that extends from the central axis to each blade as the blade rotates about the central axis and as relevant wind velocity and direction changes (abstract); the angle adjustment mechanism comprising: at least one cam (22) disposed about the central axis, the cam having an interior track (24) operably disposed about the perimeter thereof; a pushrod (5) operably connecting each blade with the cam having a proximal end and a distal end; and a track follower (23) operably positioned at the proximal end of each pushrod and operably coupled to follow the interior track throughout the rotational path of the rotor assembly; and wherein each of the blades are responsive to rotation throughout the cyclical path of the rotor assembly to vary the blade angle of each blade with respect to the direction of the wind impinging on wind vane [0016]. However, it fails to disclose a wind vane adaptable to rotate freely about the central axis so as to be substantially aligned with the direction of the wind; at least one cam having a contoured perimeter affixed below the wind vane; wherein the cam rotates in conjunction the wind vane in relation to the direction of the wind; and a cam bearing operably providing rotation of the wind vane and cam relative to the fixed central spindle; the interior track is a groove or channel formed within the cam body through which the track follower travels, wherein the interior track constrains the track follower movement in both radially inward and radially outward directions. Hamel teaches a wind vane (Fig. 1: 17) adaptable to rotate freely about the central axis so as to be substantially aligned with the direction of the wind; at least one cam (Fig. 2: 19) having a contoured perimeter affixed below the wind vane (17); wherein the cam rotates in conjunction the wind vane in relation to the direction of the wind (column 3, lines 32-36); and a cam bearing (Fig. 1: 13) operably providing rotation of the wind vane and cam relative to the fixed central spindle. Kirke teaches the interior track is a groove or channel (Fig. 1(a): 25) formed within the cam body (23) through which the track follower (22) travels, wherein the interior track constrains the track follower movement in both radially inward and radially outward directions (walls 24 and 24’). It would have been obvious to one having ordinary skill in the art before the effective filing date of the claimed invention to use the teaching of the cam and wind vane configuration as disclosed by Hamel and the interior track as disclosed by Kirke to the wind turbine disclosed by Grigg. One would have been motivated to do so to improve positioning of the blade angle to an optimal angle (refer to Hamel, abstract) and to improve accommodation of the track follower (refer to Kirke, [0040]). Regarding claim 2, Grigg discloses an electric generator (Fig. 8: 94) having a drive shaft; and a drive gear (to the left of the generator) operably affixed to the rotor assembly rotatable about the central axis and operably configured to provide rotational force to the drive shaft of the electric generator. Regarding claim 3, Grigg discloses a battery operably coupled with the electric generator for storing electrical energy [0076]. Regarding claim 4, Grigg discloses an electrical grid operably coupled with the electric generator for conducting electrical energy from the electric generator [0076]. Regarding claim 5, Grigg discloses a rotor bearing for supporting and providing rotation of the rotor assembly throughout its rotational path of motion, the rotor bearing affixed below the rotor assembly and operably affixed to the elevated platform of the support framework [0081, 0083]. Regarding claim 6, the combination of Grigg and Hamel disclose the rotor bearing (Hamel, Fig. 1: 29 and 22) comprises an outer race, inner race, a cage retainer, and a plurality of balls, wherein the outer race is operably affixed to the support framework and the inner race is operably affixed to the rotor assembly. Regarding claim 7, the combination of Grigg and Hamel disclose the rotor bearing is an angular bearing (Hamel, Fig. 1: 29 and 22). Regarding claim 8, the combination of Grigg and Hamel disclose the cam bearing (Hamel, Fig. 1: 13) comprises an outer race, inner race, a cage retainer, and a plurality of balls, wherein the outer race is operably affixed to the distal end of the central spindle and the inner race is operably affixed to the cam and wind vane. Regarding claim 9, the combination of Grigg and Hamel disclose the cam bearing (Hamel, Fig. 1: 13) comprises an outer race, inner race, a cage retainer, and a plurality of balls, wherein the outer race is operably affixed to the distal end of the central spindle and the inner race is operably affixed to the cam and wind vane. Regarding claim 10, the combination of Grigg and Hamel disclose the cam bearing is an angular bearing (Hamel, Fig. 1: 13). Regarding claim 11, Grigg discloses a pivot connection operably connecting the distal end of the pushrod and operation of the blade angle, the pivot connection having a rack and pinion type configuration (Fig. 1: 9). Regarding claim 12, Grigg discloses the rotor assembly comprises a first tier plurality of blades and a second tier of plurality of blades disposed radially about the central axis and operably positioned in line with the respective first tier plurality of blades (Fig. 8: 135). Regarding claim 13, Grigg discloses a vertical wind turbine comprising: a central axis (Fig. 1: 20) that extends in a substantially vertical direction; a support framework (27); a fixed central spindle (21) having a distal end and supported by the support framework; an electric generator (Fig. 8: 94) having a drive shaft; a rotor assembly comprising: a hub assembly (Fig. 1: at 22) disposed about the central axis; a plurality of blades (26) disposed about the central axis, the plurality of blades physically coupled to rotate together about the central axis, each blade having a blade axis (at 9) about which it rotates; and a plurality of spaced apart arm assemblies (15) connecting the plurality of blades to the hub assembly; a rotor bearing for supporting and providing rotation of the rotor assembly throughout its rotational path of motion, the rotor bearing operably affixed below the rotor assembly and operably attached to the elevated platform of the support framework [0081, 0083]; a drive gear (Fig. 8: to the left of generator 94) operably affixed to the rotor assembly rotatable about the central axis and configured to provide rotational force to the drive shaft of the electric generator (94); and an angle adjustment mechanism that is configured to adjust an angle formed between a blade and a radius that extends from the central axis to the blade as the blade rotates about the central axis and as relevant wind velocity and direction changes (abstract); the angle adjustment mechanism comprising: at least one cam (22) disposed about the central axis, the cam having an interior track (24) operably disposed about the perimeter thereof; and bearing lubrication [0150]; a pushrod (5) operably connecting each blade with the cam having a proximal end and a distal end; and a track follower (23) operably positioned at the proximal end of each pushrod and operably coupled to follow the interior track throughout the rotational path of the rotor assembly; a pivot connection (9) operably connecting the distal end of the pushrod and operation of the blade angle, the pivot connection having a rack and pinion type configuration; and wherein each of the blades are responsive to rotation throughout the cyclical path of the rotor assembly to vary the blade angle of each blade with respect to the direction of the wind impinging on wind vane [0016]. However, it fails to disclose the rotor bearing having an outer race, inner race, a cage retainer, and a plurality of balls, wherein the outer race is operably affixed to the elevated platform and the inner race is operably affixed to the rotor assembly; a wind vane adaptable to rotate freely about the central axis so as to be substantially aligned with the direction of the wind; at least one cam having a contoured perimeter affixed below the wind vane and disposed about the central axis; wherein the cam rotates in conjunction the wind vane in relation to the direction of the wind; and a cam bearing operably providing rotation of the wind vane and cam relative to the fixed central spindle, the cam bearing having an outer race, inner race, cage retainer, plurality of balls, and lubrication, wherein the outer race is operably affixed to the distal end of the central spindle and the inner race is operably affixed to the cam and wind vane; the interior track is a groove or channel formed within the cam body through which the track follower travels, wherein the interior track constrains the track follower movement in both radially inward and radially outward directions. Hamel teaches the rotor bearing (Fig. 1: 29 and 22) having an outer race, inner race, a cage retainer, and a plurality of balls, wherein the outer race is operably affixed to the elevated platform and the inner race is operably affixed to the rotor assembly; a wind vane (Fig. 1: 17) adaptable to rotate freely about the central axis so as to be substantially aligned with the direction of the wind; at least one cam (Fig. 2: 19) having a contoured perimeter affixed below the wind vane (17) and disposed about the central axis; wherein the cam rotates in conjunction the wind vane in relation to the direction of the wind (column 3, lines 32-36); and a cam bearing (13) operably providing rotation of the wind vane (17) and cam (19) relative to the fixed central spindle (11), the cam bearing having an outer race, inner race, cage retainer, plurality of balls, and lubrication, wherein the outer race is operably affixed to the distal end of the central spindle and the inner race is operably affixed to the cam and wind vane. Kirke teaches the interior track is a groove or channel (Fig. 1(a): 25) formed within the cam body (23) through which the track follower (22) travels, wherein the interior track constrains the track follower movement in both radially inward and radially outward directions (walls 24 and 24’). It would have been obvious to one having ordinary skill in the art before the effective filing date of the claimed invention to use the teaching of the cam and wind vane configuration as disclosed by Hamel and the interior track as disclosed by Kirke to the wind turbine disclosed by Grigg. One would have been motivated to do so to improve positioning of the blade angle to an optimal angle (refer to Hamel, abstract) and to improve accommodation of the track follower (refer to Kirke, [0040]). Regarding claim 14, Grigg discloses the rotor assembly comprises a first tier plurality of blades and a second tier of plurality of blades disposed radially about the central axis and operably positioned in line with the respective first tier plurality of blades (Fig. 8: 135). Regarding claim 15, Grigg discloses a battery operably coupled with the electric generator for storing electrical energy [0076]. Regarding claim 16, Grigg discloses an electrical grid operably coupled with the electric generator for transferring electrical energy from the electric generator [0076]. Response to Arguments Applicant’s arguments with respect to claims 1 and 13 have been considered but are moot because the new ground of rejection does not rely on any reference applied in the prior rejection of record for any teaching or matter specifically challenged in the argument. Conclusion Applicant's amendment necessitated the new ground(s) of rejection presented in this Office action. Accordingly, THIS ACTION IS MADE FINAL. See MPEP § 706.07(a). 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 VIET P NGUYEN whose telephone number is (571)272-9457. The examiner can normally be reached M-F 12-8. 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, Tulsidas C Patel can be reached at 571-272-2098. 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. /VIET P NGUYEN/Primary Examiner, Art Unit 2834
Read full office action

Prosecution Timeline

Oct 28, 2024
Application Filed
Jun 27, 2025
Non-Final Rejection — §103, §DP
Jan 02, 2026
Response Filed
Jan 30, 2026
Final Rejection — §103, §DP (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
61%
Grant Probability
92%
With Interview (+30.5%)
2y 3m
Median Time to Grant
Moderate
PTA Risk
Based on 708 resolved cases by this examiner. Grant probability derived from career allow rate.

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