Prosecution Insights
Last updated: July 17, 2026
Application No. 18/679,564

WIRELESS POWER TRANSMITTER HAVING MULTI-FREQUENCY OPERATION FOR REDUCED ELECTROMAGNETIC INTERFERENCE, AND RELATED METHODS AND APPARATUSES

Non-Final OA §102
Filed
May 31, 2024
Priority
Jun 01, 2023 — provisional 63/505,662
Examiner
WARMFLASH, MICHAEL J
Art Unit
2849
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
Microchip Technology Incorporated
OA Round
1 (Non-Final)
81%
Grant Probability
Favorable
1-2
OA Rounds
4m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 81% — above average
81%
Career Allowance Rate
323 granted / 400 resolved
+12.8% vs TC avg
Strong +21% interview lift
Without
With
+20.6%
Interview Lift
resolved cases with interview
Typical timeline
2y 6m
Avg Prosecution
11 currently pending
Career history
412
Total Applications
across all art units

Statute-Specific Performance

§101
0.8%
-39.2% vs TC avg
§103
79.2%
+39.2% vs TC avg
§102
12.1%
-27.9% vs TC avg
§112
1.6%
-38.4% vs TC avg
Black line = Tech Center average estimate • Based on career data from 400 resolved cases

Office Action

§102
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 . Election/Restrictions Applicant's election with traverse of Species 2 in the reply filed on 4/17/2026 is acknowledged. The traversal is on the ground(s) that distinguishing hardware components across figures 2 and 3 are not recited amongst the claims as filed. This is not found persuasive because there would still be a serious search and/or examination burden based upon the illustrated differing transmitter structures. The requirement is still deemed proper and is therefore made FINAL. Information Disclosure Statement The information disclosure statements (IDSs) submitted on 5/31/2024, and 4/11/2025 are being considered by the examiner. Claim Rejections - 35 USC § 102 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 (i.e., changing from AIA to pre-AIA ) 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 the appropriate paragraphs of 35 U.S.C. 102 that form the basis for the rejections under this section made in this Office action: A person shall be entitled to a patent unless – (a)(1) the claimed invention was patented, described in a printed publication, or in public use, on sale, or otherwise available to the public before the effective filing date of the claimed invention. Claim(s) 1-4, 12-15, 20-21, and 32-36 is/are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Patole et al. (US 2023/0047448). Patole discloses: In regard to claim 1: (Currently Amended) A method comprising: at a controller (Fig. 1 Item 16) of a wireless power transmitter (Fig. 1 Item 12), the wireless power transmitter (Fig. 1 Item 12) including an inverter (Figs. 1, & 2 Items 12 & 61) coupled to an inductor-capacitor (L-C) resonant circuitry (Figs. 1, & 2 Item 52) having one or more transmit coils (Figs. 1, & 2 Item 36), generating a wireless power transmission signal (Figs. 1, & 2 Item 44 & Par. [0026]) in the one or more transmit coils (Figs. 1, & 2 Item 36)by controlling the inverter (Figs. 1, & 2 Items 16, 12, 61 & Par. [0025]); and in a multi-frequency operation (Figs. 1, 2, and 6A Item 90 and Par. [0046] i.e. 6 frequency levels shown with f1 as the lowest and f2 as the highest, (Examiner will be interpreting the levels from f1- f2 as frequency levels 1-6)) of the wireless power transmitter (Fig. 1 Item 12), controlling the inverter (Figs. 1, & 2 Items 16, 12, 61 & Par. [0025]) to vary an operating frequency of the wireless power transmission signal to repeatedly switch between a fundamental frequency (Figs. 1, 2, and 6A Item 90 i.e. level 3) and one of a lower frequency (Figs. 1, 2, and 6A Item 90 i.e. level 1) and an upper frequency (Figs. 1, 2, and 6A Item 90 i.e. level 6) in an alternating manner (Figs. 1, 2, and 6A Item 90), the lower frequency (Figs. 1, 2, and 6A Item 90 i.e. level 1) offset from the fundamental frequency (Figs. 1, 2, and 6A Item 90 i.e. level 3) by a first offset (Figs. 1, 2, and 6A Item 90 i.e. offset shown between level 1 and level 3), the upper frequency (Figs. 1, 2, and 6A Item 90 i.e. level 6) offset from the fundamental frequency (Figs. 1, 2, and 6A Item 90 i.e. level 3) by a second offset (Figs. 1, 2, and 6A Item 90 i.e. offset shown between level 3 and level 6), the second offset (Figs. 1, 2, and 6A Item 90 i.e. offset shown between level 3 and level 6) different from the first offset (Figs. 1, 2, and 6A Item 90 i.e. offset shown between level 1 and level 3), the first offset (Figs. 1, 2, and 6A Item 90 i.e. offset shown between level 1 and level 3)and the second offset (Figs. 1, 2, and 6A Item 90 i.e. offset shown between level 3 and level 6) to ensure a transmit power in the multi-frequency operation (Figs. 1, 2, and 6A Item 90 and Par. [0046]) is substantially the same as a transmit power at the fundamental frequency (Figs. 1, 2, and 6A Item 90 and Par. [0046] i.e. level 3). In regard to claim 2: (Currently Amended) The method of claim 1, wherein theL-C resonant circuitry (Figs. 1, & 2 Item 52) exhibits a non-linear relationship between the operating frequency (Figs. 1, 2, and 6A Item 90) and the transmit power (Figs. 1, & 2 Item 44 & Par. [0026]). In regard to claim 3: (Original) The method of claim 1, wherein the first offset (Figs. 1, 2, and 6A Item 90 i.e. offset shown between level 1 and level 3) associated with the lower frequency (Figs. 1, 2, and 6A Item 90 i.e. level 1) and the second offset (Figs. 1, 2, and 6A Item 90 i.e. offset shown between level 3 and level 6) associated with the upper frequency (Figs. 1, 2, and 6A Item 90 i.e. level 6) are to ensure a square of a root mean square (RMS) coil current through the one or more transmit coils (Figs. 1, & 2 Item 36 & Pars. [0006-0007] i.e. spread spectrum used) in the multi- frequency operation (Figs. 1, 2, and 6A Item 90 and Par. [0046] i.e. 6 frequency levels shown with f1 as the lowest and f2 as the highest, (Examiner will be interpreting the levels from f1- f2 as frequency levels 1-6)) is substantially the same as a square of an RMS coil current through the one or more transmit coils (Figs. 1, & 2 Item 36 & Pars. [0006-0007] i.e. spread spectrum used) at the fundamental frequency (Figs. 1, 2, and 6A Item 90 i.e. level 3). In regard to claim 4: (Original) The method of claim 1, wherein the first offset (Figs. 1, 2, and 6A Item 90 i.e. offset shown between level 1 and level 3) associated with the lower frequency (Figs. 1, 2, and 6A Item 90 i.e. level 1) and the second offset (Figs. 1, 2, and 6A Item 90 i.e. offset shown between level 3 and level 6) associated with the upper frequency (Figs. 1, 2, and 6A Item 90 i.e. level 6) are to ensure a root mean square (RMS) coil current through the one or more transmit coils (Figs. 1, & 2 Item 36 & Pars. [0006-0007] i.e. spread spectrum used) in the multi-frequency operation (Figs. 1, 2, and 6A Item 90 and Par. [0046] i.e. 6 frequency levels shown with f1 as the lowest and f2 as the highest, (Examiner will be interpreting the levels from f1- f2 as frequency levels 1-6)) is substantially the same as an RMS coil current through the one or more transmit coils (Figs. 1, & 2 Item 36 & Pars. [0006-0007] i.e. spread spectrum used) at the fundamental frequency (Figs. 1, 2, and 6A Item 90 i.e. level 3). In regard to claim 12: (Original) The method of claim 1, wherein controlling the operating frequency of the wireless power transmission signal comprises controlling the operating frequency of the wireless power transmission signal (Figs. 1, & 2 Items 16, 12, 61 & Par. [0025]) to repeatedly switch in the alternating manner at a rate of greater than or equal to 20 kilohertz (kHz) (Figs. 1, 2, 5 and 6A Item 90 and Par. [0043]). In regard to claim 13: (Currently Amended) An apparatus comprising: a wireless power transmitter comprising: a transmitter circuitry (Fig. 1 Item 12), the transmitter circuitry (Fig. 1 Item 12) including an inverter (Figs. 1, & 2 Items 12 & 61) coupled to an inductor-capacitor (L-C) resonant circuitry (Figs. 1, & 2 Item 52), the L-C resonant circuitry including one or more transmit coils (Figs. 1, & 2 Item 36) to inductively couple with one or more receive coils of a wireless power receiver (Figs. 1 Item 24 and 48) ; and a controller (Fig. 1 Item 16) operably coupled to the transmitter circuitry (Fig. 1 Item 12), the controller (Fig. 1 Item 16) to control the transmitter circuitry to generate a wireless power transmission signal (Figs. 1, & 2 Item 44 & Par. [0026]) in the one or more transmit coils (Figs. 1, & 2 Item 36) for wireless power transfer (Figs. 1, & 2 Item 8), including controlling (Figs. 1, & 2 Items 16, 12, 61 & Par. [0025]) an operating frequency of the wireless power transmission signal (Figs. 1, & 2 Item 44 & Par. [0026]) to repeatedly switch between a fundamental frequency (Figs. 1, 2, and 6A Item 90 i.e. level 3) and one of a lower frequency (Figs. 1, 2, and 6A Item 90 i.e. level 1) and an upper frequency (Figs. 1, 2, and 6A Item 90 i.e. level 6) in an alternating manner in a multi-frequency operation (Figs. 1, 2, and 6A Item 90 and Par. [0046] i.e. 6 frequency levels shown with f1 as the lowest and f2 as the highest, (Examiner will be interpreting the levels from f1- f2 as frequency levels 1-6)), the lower frequency (Figs. 1, 2, and 6A Item 90 i.e. level 1) offset from the fundamental frequency (Figs. 1, 2, and 6A Item 90 i.e. level 3) by a first offset (Figs. 1, 2, and 6A Item 90 i.e. offset shown between level 1 and level 3), the upper frequency (Figs. 1, 2, and 6A Item 90 i.e. level 6) offset from the fundamental frequency (Figs. 1, 2, and 6A Item 90 i.e. level 3) by a second offset (Figs. 1, 2, and 6A Item 90 i.e. offset shown between level 3 and level 6), the second offset (Figs. 1, 2, and 6A Item 90 i.e. offset shown between level 3 and level 6) different from the first offset (Figs. 1, 2, and 6A Item 90 i.e. offset shown between level 1 and level 3), the first offset (Figs. 1, 2, and 6A Item 90 i.e. offset shown between level 1 and level 3) and the second offset (Figs. 1, 2, and 6A Item 90 i.e. offset shown between level 3 and level 6) to ensure a transmit power in the multi-frequency operation (Figs. 1, 2, and 6A Item 90 and Par. [0046]) is substantially the same as a transmit power at the fundamental frequency (Figs. 1, 2, and 6A Item 90 and Par. [0046] i.e. level 3). In regard to claim 14: (Currently Amended) The apparatus of claim 13, wherein theL-C resonant circuitry (Figs. 1, & 2 Item 52)exhibits a non-linear relationship between the operating frequency (Figs. 1, 2, and 6A Item 90) and the transmit power (Figs. 1, & 2 Item 44 & Par. [0026]). In regard to claim 15: (Original) The apparatus of claim 13, wherein the first offset (Figs. 1, 2, and 6A Item 90 i.e. offset shown between level 1 and level 3) associated with the lower frequency (Figs. 1, 2, and 6A Item 90 i.e. level 1) and the second offset (Figs. 1, 2, and 6A Item 90 i.e. offset shown between level 3 and level 6) associated with the upper frequency (Figs. 1, 2, and 6A Item 90 i.e. level 6) to ensure a root mean square (RMS) coil current through the one or more transmit coils (Figs. 1, & 2 Item 36 & Pars. [0006-0007] i.e. spread spectrum used) in the multi-frequency operation (Figs. 1, 2, and 6A Item 90 and Par. [0046] i.e. 6 frequency levels shown with f1 as the lowest and f2 as the highest, (Examiner will be interpreting the levels from f1- f2 as frequency levels 1-6)) is substantially the same as an RMS coil current through the one or more transmit coils (Figs. 1, & 2 Item 36 & Pars. [0006-0007] i.e. spread spectrum used) at the fundamental frequency (Figs. 1, 2, and 6A Item 90 i.e. level 3). In regard to claim 20: (Currently Amended) A method comprising: at a controller (Fig. 1 Item 16) of a wireless power transmitter (Fig. 1 Item 12) having a multi-frequency operation (Figs. 1, 2, and 6A Item 90 and Par. [0046] i.e. 6 frequency levels shown with f1 as the lowest and f2 as the highest, (Examiner will be interpreting the levels from f1- f2 as frequency levels 1-6)), the wireless power transmitter (Fig. 1 Item 12) including an inverter (Figs. 1, & 2 Items 12 & 61) coupled to an inductor-capacitor (L-C) resonant circuitry (Figs. 1, & 2 Item 52) having one or more transmit coils (Figs. 1, & 2 Item 36): determining (Fig. 1 Item 16 & Pars. [0022] and [0058] i.e. determination ) a fundamental frequency (Figs. 1, 2, and 6A Item 90 i.e. level 3) of a wireless power transmission signal (Figs. 1, & 2 Items 44, and 90 & Par. [0026]), the wireless power transmission signal (Figs. 1, & 2 Items 44, and 90 & Par. [0026]) at the fundamental frequency (Figs. 1, 2, and 6A Item 90 i.e. level 3) to produce a first root mean square (RMS) coil current or power through the one or more transmit coils (Figs. 1, & 2 Items 36, 44 & Par. [0026])or power through the one or more transmit coils (Figs. 1, & 2 Items 36, 44 & Par. [0026]), the first offset (Figs. 1, 2, and 6A Item 90 i.e. offset shown between level 1 and level 3) associated with the lower frequency (Figs. 1, 2, and 6A Item 90 i.e. level 1) and the second offset (Figs. 1, 2, and 6A Item 90 i.e. offset shown between level 3 and level 6) associated with the upper frequency (Figs. 1, 2, and 6A Item 90 i.e. level 6) to ensure an RMS coil current or power in the multi-frequency operation (Figs. 1, 2, and 6A Item 90 and Par. [0046]) is substantially the same as the first RMS coil current or power at the fundamental frequency (Figs. 1, 2, and 6A Item 90 and Par. [0046] i.e. level 3). In regard to claim 21: (Currently Amended) The method of claim 20, wherein theL-C resonant circuitry (Figs. 1, & 2 Item 52)exhibits a non- linear relationship between operating frequency (Figs. 1, 2, and 6A Item 90) and transmit power (Figs. 1, & 2 Item 44 & Par. [0026]). In regard to claim 32: (Original) The method of claim 20, comprising: at the controller (Fig. 1 Item 16) of the wireless power transmitter (Fig. 1 Item 12), generating the wireless power transmission signal at the fundamental frequency (Figs. 1, 2, and 6A Item 90 i.e. level 3), at the lower frequency (Figs. 1, 2, and 6A Item 90 i.e. level 1), and at the upper frequency (Figs. 1, 2, and 6A Item 90 i.e. level 6). In regard to claim 33: (Original) The method of claim 20, comprising: at the controller (Fig. 1 Item 16) of the wireless power transmitter (Fig. 1 Item 12), generating the wireless power transmission signal (Figs. 1, & 2 Item 44 & Par. [0026]); and controlling an operating frequency of the wireless power transmission signal to repeatedly switch between the fundamental frequency (Figs. 1, 2, and 6A Item 90 i.e. level 3) and one of the lower frequency (Figs. 1, 2, and 6A Item 90 i.e. level 1) and the upper frequency (Figs. 1, 2, and 6A Item 90 i.e. level 6) in an alternating manner (Figs. 1, 2, and 6A Item 90). In regard to claim 34: (Original) The method of claim 33, wherein controlling the operating frequency of the wireless power transmission signal (Figs. 1, & 2 Items 16, 12, 61 & Par. [0025]) comprises controlling the operating frequency of the wireless power transmission signal to repeatedly switch in the alternating manner at a rate of greater than or equal to 20 kilohertz (kHz) (Figs. 1, 2, 5 and 6A Item 90 and Par. [0043]). In regard to claim 35: (Currently Amended) An apparatus comprising: a wireless power transmitter (Fig. 1 Item 12) comprising: a transmitter circuitry (Figs. 1 & 2 Item 12), the transmitter circuitry including an inverter (Figs. 1, & 2 Items 12 & 61) coupled to an inductor-capacitor (L-C) resonant circuitry (Figs. 1, & 2 Item 52), the L-C resonant circuitry (Figs. 1, & 2 Item 52) including one or more transmit coils (Figs. 1, & 2 Item 36) to inductively couple with one or more receive coils (Figs. 1 Item 48) of a wireless power receiver (Figs. 1 Items 24 and 48); and a controller (Fig. 1 Item 16) operably coupled to the transmitter circuitry (Fig. 1 Item 12), the controller (Fig. 1 Item 16) to: determine (Fig. 1 Item 16 & Pars. [0022] and [0058] i.e. determination) a fundamental frequency (Figs. 1, 2, and 6A Item 90 i.e. level 3) of a wireless power transmission signal (Figs. 1, & 2 Items 44, and 90 & Par. [0026]), the wireless power transmission signal (Figs. 1, & 2 Items 44, and 90 & Par. [0026]) at the fundamental frequency (Figs. 1, 2, and 6A Item 90 i.e. level 3) to produce a first root mean square (RMS) coil current or power through the one or more transmit coils (Figs. 1, & 2 Items 36, 44 & Par. [0026]); determine (Fig. 1 Item 16 & Pars. [0022] and [0058] i.e. determination) a lower frequency (Figs. 1, 2, and 6A Item 90 i.e. level 1) of the wireless power transmission signal (Figs. 1, & 2 Items 44, and 90 & Par. [0026]) relative to the fundamental frequency (Figs. 1, 2, and 6A Item 90 i.e. level 3), the lower frequency (Figs. 1, 2, and 6A Item 90 i.e. level 1) offset from the fundamental frequency (Figs. 1, 2, and 6A Item 90 i.e. level 3) by a first offset (Figs. 1, 2, and 6A Item 90 i.e. offset shown between level 1 and level 3), the wireless power transmission signal (Figs. 1, & 2 Items 44, and 90 & Par. [0026]) at the lower frequency (Figs. 1, 2, and 6A Item 90 i.e. level 1) to produce a second RMS coil current or power through the one or more transmit coils (Figs. 1, & 2 Items 36, 44 & Par. [0026]); and determine (Fig. 1 Item 16 & Pars. [0022] and [0058] i.e. determination) an upper frequency (Figs. 1, 2, and 6A Item 90 i.e. level 6) of the wireless power transmission signal (Figs. 1, & 2 Items 44, and 90 & Par. [0026]) relative to the fundamental frequency (Figs. 1, 2, and 6A Item 90 i.e. level 3), the upper frequency (Figs. 1, 2, and 6A Item 90 i.e. level 6) offset from the fundamental frequency (Figs. 1, 2, and 6A Item 90 i.e. level 3) by a second offset (Figs. 1, 2, and 6A Item 90 i.e. offset shown between level 3 and level 6), the second offset (Figs. 1, 2, and 6A Item 90 i.e. offset shown between level 3 and level 6) different from the first offset (Figs. 1, 2, and 6A Item 90 i.e. offset shown between level 1 and level 3), the wireless power transmission signal (Figs. 1, & 2 Items 44, and 90 & Par. [0026]) at the upper frequency to produce a third RMS coil current or power through the one or more transmit coils (Figs. 1, & 2 Items 36, 44 & Par. [0026]), the first offset (Figs. 1, 2, and 6A Item 90 i.e. offset shown between level 1 and level 3) associated with the lower frequency (Figs. 1, 2, and 6A Item 90 i.e. level 1) and the second offset (Figs. 1, 2, and 6A Item 90 i.e. offset shown between level 3 and level 6) associated with the upper frequency (Figs. 1, 2, and 6A Item 90 i.e. level 6) to ensure an RMS coil current or power in a multi-frequency operation (Figs. 1, 2, and 6A Item 90 and Par. [0046] i.e. 6 frequency levels shown with f1 as the lowest and f2 as the highest, (Examiner will be interpreting the levels from f1- f2 as frequency levels 1-6)) is substantially the same as the first RMS coil current or power at the fundamental frequency (Figs. 1, 2, and 6A Item 90 and Par. [0046] i.e. level 3). In regard to claim 36: (Currently Amended) The apparatus of claim 35, wherein theL-C resonant circuitry (Figs. 1, & 2 Item 52) exhibits a non-linear relationship between operating frequency (Figs. 1, 2, and 6A Item 90) and transmit power (Figs. 1, & 2 Item 44 & Par. [0026]). Allowable Subject Matter Claims 5-11, 16-19, 22-29, 30-31, and 37 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. Conclusion The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. Please see attached form PTO-892. Any inquiry concerning this communication or earlier communications from the examiner should be directed to MICHAEL J WARMFLASH whose telephone number is (571)270-1434. The examiner can normally be reached 8AM-6PM EST M-Th. 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, Menatoallah Youssef can be reached at (571)2703684. 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. MW 6/26/2026 /Menatoallah Youssef/SPE, Art Unit 2836
Read full office action

Prosecution Timeline

May 31, 2024
Application Filed
Jul 02, 2026
Non-Final Rejection mailed — §102 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12683378
SWITCH DEVICE, ELECTRONIC DEVICE AND VEHICLE
1y 3m to grant Granted Jul 14, 2026
Patent 12676479
METHOD FOR IMPLEMENTING FAST POWER RESPONSE AND NEW ENERGY POWER PLANT
2y 10m to grant Granted Jul 07, 2026
Patent 12671270
GENERALIZED SINGLE-SIDE COMPENSATION NETWORKS FOR INDUCTIVE WIRELESS POWER TRANSFER SYSTEMS
1y 12m to grant Granted Jun 30, 2026
Patent 12671273
Wireless Power Transfer Systems for Kitchen Appliances
1y 5m to grant Granted Jun 30, 2026
Patent 12658350
COIL COMPONENT
1y 6m to grant Granted Jun 16, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

Strategy Recommendation AI-generated — please review before filing

Get a prosecution strategy drawn from examiner precedents, rejection analysis, and claim mapping.
Typically takes 5-10 seconds — AI-generated, attorney review required before filing

Prosecution Projections

1-2
Expected OA Rounds
81%
Grant Probability
99%
With Interview (+20.6%)
2y 6m (~4m remaining)
Median Time to Grant
Low
PTA Risk
Based on 400 resolved cases by this examiner. Grant probability derived from career allowance rate.

Sign in with your work email

Enter your email to receive a magic link. No password needed.

Personal email addresses (Gmail, Yahoo, etc.) are not accepted.

Free tier: 3 strategy analyses per month