Prosecution Insights
Last updated: August 18, 2026
Application No. 18/618,009

ELECTRIC POWER GENERATION USING PLANAR ARRAY OF FERRITE CORES

Final Rejection §103
Filed
Mar 27, 2024
Examiner
JOHNSON, ERIC
Art Unit
2834
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
Cisco Technology Inc.
OA Round
2 (Final)
62%
Grant Probability
Moderate
3-4
OA Rounds
6m
Est. Remaining
85%
With Interview

Examiner Intelligence

Grants 62% of resolved cases
62%
Career Allowance Rate
541 granted / 872 resolved
-6.0% vs TC avg
Strong +23% interview lift
Without
With
+22.6%
Interview Lift
resolved cases with interview
Typical timeline
2y 11m
Avg Prosecution
29 currently pending
Career history
899
Total Applications
across all art units

Statute-Specific Performance

§101
0.9%
-39.1% vs TC avg
§103
50.5%
+10.5% vs TC avg
§102
25.4%
-14.6% vs TC avg
§112
21.1%
-18.9% vs TC avg
Black line = Tech Center average estimate • Based on career data from 872 resolved cases

Office Action

§103
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 § 103 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. 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 1-2, 4-5, 7-11, 14 and 16-20 are rejected under 35 U.S.C. 103 as being unpatentable over Pan (US20110115327, “Pan”) in view of Aoyama et al. (US20220252627, “Aoyama”). Re claim 1, Pan discloses an apparatus including: a base plate (figs 1, 5 & below, [0035] & [0049, note: both figs 1 & 5 employed for rejection; fig 5 same as fig 1 except 2nd set of cores/coils on other side of rotor); a plurality of ferrite cores 114 arranged on the base plate in a geometric pattern (figs 1-5, [0039], [0041-0042] & [0044], says 114 can be same number as magnets 103 so 114 are in circular pattern), each ferrite core 114 in the plurality of ferrite cores having a longitudinal axis 150 that is normal to the base plate (figs 1 & 3-5, [0046]); at least one coil 112 wound around each ferrite core 114 in the plurality of ferrite cores (figs 1 & 3-5, [0039]); and an array of magnets 103 arranged to pass over exposed end faces of each ferrite core 114 in the plurality of ferrite cores (figs 1-5 & below, [0031] & [0039]). PNG media_image1.png 498 360 media_image1.png Greyscale PNG media_image2.png 330 364 media_image2.png Greyscale Pan discloses claim 1 except for heights, along the longitudinal axis, of respective ferrite cores in the plurality of ferrite cores increase to a predetermined full height over a predetermined distance. Aoyama discloses heights, along the longitudinal axis, of respective cores 22 in the plurality of cores 22 increase to a predetermined full height over a predetermined distance (figs 1-2, 4 & below, [0060-0061]); and substituting flat core surfaces 25 facing magnets with curved core surfaces 25a facing magnets (fig 4, [0060-0061]). PNG media_image3.png 284 351 media_image3.png Greyscale It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to substitute one known element (flat ferrite core surface facing magnets as disclosed by Pan) for another known equivalent element (curved ferrite core surface facing magnets as disclosed by Aoyama; equivalence taught by Aoyama) resulting in the predictable result of forming the ferrite core surface to interact with the magnets. Re claim 2, Pan in view of Aoyama discloses claim 1 as discussed above. Pan further discloses the base plate is comprised of a ferrous material ([0037]). Re claim 4, Pan in view of Aoyama discloses claim 1 as discussed above. Pan further discloses each ferrite core 114 comprises multiple overlapping coils (figs 1, 3 & 5, 112 made of plural layers of coil turns). Re claim 5, Pan in view of Aoyama discloses claim 1 as discussed above. Pan further discloses each ferrite core 114 includes a protrusion 117a at one end that couples to a corresponding opening in the base plate (figs 1, 3-5 & above for claim 1, [0043]). Re claim 7, Pan in view of Aoyama discloses claim 1 as discussed above. Pan and further discloses the base plate is circular ([0035], shape of disk). Re claim 8, Pan in view of Aoyama discloses claim 1 as discussed above. Pan further discloses magnets 103 in the array of magnets are spaced to correspond to a spacing of the plurality of ferrite cores 114 (fig 2, [0039]). Re claim 9, Pan in view of Aoyama discloses claim 1 as discussed above. Pan further discloses an electric power regulation and isolation circuit electrically connected to the at least one coil wound around each ferrite core in the plurality of ferrite cores (fig 8, [0060-0063], says can output three phase AC where each phase is inherently isolated from other phases). Re claim 10, Pan in view of Aoyama discloses claim 1 as discussed above. Pan further discloses the array of magnets is caused to move over the exposed end faces using at least one of a moving vehicle, wave energy, or liquid flow ([0002], automobiles). Re claim 11, Pan discloses an apparatus comprising: a ferrous base plate (figs 1, 5 & above for claim 1, [0035], [0037] & [0049], note: both figs 1 & 5 employed for rejection; fig 5 same as fig 1 except 2nd set of cores/coils on other side of rotor); ferrite cores 114 arranged on the ferrous base plate (figs 1-5, [0039], [0041-0042] & [0044]), the ferrite cores 114 having a longitudinal axis 150 that is normal to the ferrous base plate (figs 1 & 3-5, [0046]); the ferrite cores having respective exposed end faces (figs 1, 3-5 & above for claim 1); at least one coil 112 respectively wound around the ferrite cores 114 (figs 1 & 3-5, [0039]); and an array of magnets 103 arranged to pass over the respective exposed end faces (figs 1-5, [0031] & [0039]). Pan discloses claim 11 except for heights, along the longitudinal axis, of respective ferrite cores among the ferrite cores increase to a predetermined full height over a predetermined distance. Aoyama discloses heights, along the longitudinal axis, of respective cores among cores 22 increase to a predetermined full height over a predetermined distance (figs 1-2, 4 & above for claim 1, [0060-0061]); and substituting flat core surfaces 25 facing magnets with curved core surfaces 25a facing magnets (fig 4, [0060-0061]). It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to substitute one known element (flat ferrite core surface facing magnets as disclosed by Pan) for another known equivalent element (curved ferrite core surface facing magnets as disclosed by Aoyama; equivalence taught by Aoyama) resulting in the predictable result of forming the ferrite core surface to interact with the magnets. Re claim 14, Pan in view of Aoyama discloses claim 11 as discussed above. Pan further discloses the ferrite cores 114 include a protrusion 117a at one end that couples to a corresponding opening in the ferrous base plate (figs 1, 3-5 & above for claim 1, [0043]). Re claim 16, Pan in view of Aoyama discloses claim 11 as discussed above. Pan further discloses the ferrous base plate is circular ([0035], shape of disk). Re claim 17, Pan in view of Aoyama discloses claim 11 as discussed above. Pan further discloses magnets in the array of magnets 103 are spaced to correspond to a spacing of the ferrite cores114 (fig 2, [0039]). Re claim 18, Pan discloses method, comprising: moving a magnet 103 across exposed end surfaces of ferrite cores 114 arranged in an array (figs 1-5 & above for claim 1, [0031], [0039], [0041-0042] & [0044]), wherein each ferrite core 114 among the ferrite cores has a coil 112 wrapped therearound (figs 1 & 3-5, [0039]); generating a changing magnetic flux gradient in the ferrite cores 114 responsive to magnet 103 moving across the exposed end surfaces of the ferrite cores ([0046]); capturing electrical power induced in each coil 112 by the changing magnetic flux gradient ([0047]); and distributing the electrical power to a load (fig 8, [0062] & [0065]). Pan discloses claim 18 except for heights, along the longitudinal axis, of respective ferrite cores among the ferrite cores increase to a predetermined full height over a predetermined distance. Aoyama discloses heights, along the longitudinal axis, of respective cores 22 among the cores 22 increase to a predetermined full height over a predetermined distance (figs 1-2, 4 & above for claim 1, [0060-0061]); and substituting flat core surfaces 25 facing magnets with curved core surfaces 25a facing magnets (fig 4, [0060-0061]). It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to substitute one known element (flat ferrite core surface facing magnets as disclosed by Pan) for another known equivalent element (curved ferrite core surface facing magnets as disclosed by Aoyama; equivalence taught by Aoyama) resulting in the predictable result of forming the ferrite core surface to interact with the magnets. Re claim 19, Pan in view of Aoyama discloses claim 18 as discussed above. Pan further discloses the magnet 103 is part of an array of magnets (fig 2, circular array of magnets). Re claim 20, Pan in view of Aoyama discloses claim 18 as discussed above. Pan further discloses moving the magnet 103 using at least one of a moving vehicle, wave energy, or liquid flow ([0002], automobiles). Claims 1, 3, 6, 11-13 and 15 are rejected under 35 U.S.C. 103 as being unpatentable over Hayashi et al. (US20210359559, “Hayashi”) in view of Aoyama. Re claim 1, Hayashi discloses an apparatus including: a base plate 113 (figs 1-2, [0062]); a plurality of ferrite cores 112 arranged on the base plate 113 in a geometric pattern (figs 1-2 & 6, [0062-0063]), each ferrite core 112 in the plurality of ferrite cores having a longitudinal axis that is normal to the base plate 113 (figs 1-2 & 6); at least one coil 111 wound around each ferrite core 112 in the plurality of ferrite cores (figs 2 & 6, [0062-0063]); and an array of magnets 123 arranged to pass over exposed end faces of each ferrite core 112 in the plurality of ferrite cores (figs 1 & 3-6, [0061], [0065] & [0072]). Hayashi discloses claim 1 except for heights, along the longitudinal axis, of respective ferrite cores in the plurality of ferrite cores increase to a predetermined full height over a predetermined distance. Aoyama discloses heights, along the longitudinal axis, of respective cores 22 in the plurality of cores 22 increase to a predetermined full height over a predetermined distance (figs 1-2, 4 & above for claim 1, [0060-0061]); and substituting flat core surfaces 25 facing magnets with curved core surfaces 25a facing magnets (fig 4, [0060-0061]). It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to substitute one known element (flat ferrite core surface facing magnets as disclosed by Hayashi) for another known equivalent element (curved ferrite core surface facing magnets as disclosed by Aoyama; equivalence taught by Aoyama) resulting in the predictable result of forming the ferrite core surface to interact with the magnets. Re claim 3, Hayashi in view of Aoyama discloses claim 1 as discussed above. Hayashi further discloses the geometric pattern comprises rows and columns (fig 2). Re claim 6, Hayashi in view of Aoyama discloses claim 1 as discussed above. Hayashi further discloses the base plate 120 is square (fig 2). Re claim 11, Hayashi discloses an apparatus comprising: a ferrous base plate 113 (figs 1-2, [0062]); ferrite cores 112 arranged on the ferrous base plate 113 (figs 1-2 & 6, [0062-0063]), the ferrite cores 112 having a longitudinal axis that is normal to the ferrous base plate 113 (figs 1-2 & 6); the ferrite cores 112 having respective exposed end faces (fig 2); at least one coil 111 respectively wound around the ferrite cores 112 (figs 2 & 6, [0062-0063]); and an array of magnets 123 arranged to pass over the respective exposed end faces (figs 1 & 3-6, [0061], [0065] & [0072]). Hayashi discloses claim 11 except for heights, along the longitudinal axis, of respective ferrite cores among the ferrite cores increase to a predetermined full height over a predetermined distance. Aoyama discloses heights, along the longitudinal axis, of respective cores among cores 22 increase to a predetermined full height over a predetermined distance (figs 1-2, 4 & above for claim 1, [0060-0061]); and substituting flat core surfaces 25 facing magnets with curved core surfaces 25a facing magnets (fig 4, [0060-0061]). It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to substitute one known element (flat ferrite core surface facing magnets as disclosed by Hayashi) for another known equivalent element (curved ferrite core surface facing magnets as disclosed by Aoyama; equivalence taught by Aoyama) resulting in the predictable result of forming the ferrite core surface to interact with the magnets. Re claim 12, Hayashi discloses claim 11 as discussed above and further discloses the ferrite cores 112 are arranged in rows and columns (fig 2). Re claim 13, Hayashi in view of Aoyama discloses claim 12 as discussed above. Hayashi further discloses the ferrite cores 112 comprises multiple overlapping coils (figs 2 & 6, 111 made of plural layers of coil turns). Re claim 15, Hayashi in view of Aoyama discloses claim 11 as discussed above. Hayashi further discloses the ferrous base plate 113 is square (fig 2). Response to Arguments Applicant’s arguments with respect to the claim 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 extension fee 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 date of this final action. Any inquiry concerning this communication or earlier communications from the examiner should be directed to ERIC JOHNSON whose telephone number is (571)270-5715. The examiner can normally be reached on Mon-Fri 8:30-5pm 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, Seye Iwarere can be reached on (571)270-5112. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of an application may be obtained from the Patent Application Information Retrieval (PAIR) system. Status information for published applications may be obtained from either Private PAIR or Public PAIR. Status information for unpublished applications is available through Private PAIR only. For more information about the PAIR system, see https://ppair-my.uspto.gov/pair/PrivatePair. Should you have questions on access to the Private PAIR system, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative or access to the automated information system, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. /ERIC JOHNSON/Primary Examiner, Art Unit 2834
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Prosecution Timeline

Mar 27, 2024
Application Filed
Dec 19, 2025
Non-Final Rejection mailed — §103
Mar 12, 2026
Applicant Interview (Telephonic)
Mar 12, 2026
Examiner Interview Summary
Mar 13, 2026
Response Filed
May 20, 2026
Final Rejection mailed — §103 (current)

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Prosecution Projections

3-4
Expected OA Rounds
62%
Grant Probability
85%
With Interview (+22.6%)
2y 11m (~6m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 872 resolved cases by this examiner. Grant probability derived from career allowance rate.

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