Prosecution Insights
Last updated: August 17, 2026
Application No. 18/579,748

INDUCTION HEATING TYPE COOKTOP

Non-Final OA §103
Filed
Jan 16, 2024
Priority
Jul 16, 2021 — RE 10-2021-0093787 +1 more
Examiner
VAN, QUANG T
Art Unit
Tech Center
Assignee
LG Electronics Inc.
OA Round
1 (Non-Final)
74%
Grant Probability
Favorable
1-2
OA Rounds
10m
Est. Remaining
82%
With Interview

Examiner Intelligence

Grants 74% — above average
74%
Career Allowance Rate
814 granted / 1099 resolved
+14.1% vs TC avg
Moderate +8% lift
Without
With
+8.4%
Interview Lift
resolved cases with interview
Typical timeline
3y 5m
Avg Prosecution
20 currently pending
Career history
1110
Total Applications
across all art units

Statute-Specific Performance

§101
0.5%
-39.5% vs TC avg
§103
57.7%
+17.7% vs TC avg
§102
23.9%
-16.1% vs TC avg
§112
13.8%
-26.2% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1099 resolved cases

Office Action

§103
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 (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 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) 10-11 is/are rejected under 35 U.S.C. 103 as being unpatentable over SON et al (US 2018/0177000). Regarding claims 1-2, Son discloses induction heat cooking apparatus and method for operating the same comprising an upper plate (11) having a heating region configured to heat a cooking container (1) placed thereon; a working coil (12) configured to generate a magnetic field to heat the cooking container (1, par. 0047-par. 0049, Figure 2); and an inverter (140) having a driveable switch (Insulated gate bipolar transistor (IGBT)) configured to control a current flowing through the working coil (150, par. 0066, Figure 3). Son does not clearly disclose an area of the working coil is smaller than an area of the heating region. However, Son could be simply changed in the design of the heating coil (150) which included in the electromagnetic induction heating cooker (par. 0044, Figure 3). It would have been obvious to one ordinary skill in the art before the effective filling date of the invention was made to have changed in the design of the heating coil which included in the electromagnetic induction heating cooker in order to increase the area of the heating region. Claim(s) 12-13, 15-17, 22-24 and 29 is/are rejected under 35 U.S.C. 103 as being unpatentable over Son et al (US 2018/0177000) in view of JP2018097990A cited by applicant. Regarding claims 12-13, 15-16 and 22-23, Son discloses substantially all features of the claimed invention except the working coil is arranged such that a distance between a first turn of the working coil and a second turn of the working coil adjacent to the first turn of the working coil is spaced apart from each other by a preset interval. JP2018097990A discloses an electromotive force caused by a coil is controlled by distance between a power supply coil and a power receiving coil or the areas of the power supply coil and the power receiving coil (claim 10). It would have been obvious to one ordinary skill in the art before the effective filling date of the invention was made to utilize in Son an electromotive force caused by a coil is controlled by distance between a power supply coil and a power receiving coil or the areas of the power supply coil and the power receiving coil in order to control the heating region. Regarding claims 17, 24 and 29, Son discloses the inverter operates in a frequency band of 50khz or higher (par. 0082). Claim(s) 14, 28 is/are rejected under 35 U.S.C. 103 as being unpatentable over Son et al (US 2018/0177000) in view of JP2018097990A cited by applicant and further in view of Otsu et al (US 2018/0358874). Regarding claims 14 and 28, Son/J P2018097990A discloses substantially all features of the claimed invention except the switch is a silicon carbide element. Otsu discloses a switch id a silicon carbide element (par. 0039). It would have been obvious to one ordinary skill in the art before the effective filling date of the invention was made to utilize in Son/JP2018097990A the switch is a silicon carbide element as taught by Otsu in order to provide switch faster with higher efficiency and reduces heat generation. Claim(s) 18-19 is/are rejected under 35 U.S.C. 103 as being unpatentable over Son et al (US 2018/0177000) in view of JP2018097990A cited by applicant and further in view of Moon et al (11,133,710). Regarding claims 18, Son/JP2018097990A discloses substantially all features of the claimed invention except at least one ferrite core located below the working coil. Moon discloses at least one ferrite core located below the working coil (col. 12, lines 40-41). It would have been obvious to one ordinary skill in the art before the effective filling date of the invention was made to utilize in Son/JP2018097990A as taught by Moon in order to increase magnetic flux and to make the coil more efficient. Regarding claims 19, Moon discloses the working coil has a rectangular perimeter (col. 38, lines 29-41), and wherein the at least one ferrite core (1620) includes a plurality of ferrite cores (Figure 15). 31 Claim(s) 25-26 is/are rejected under 35 U.S.C. 103 as being unpatentable over Son et al (US 2018/0177000) in view of Moon et al (11,133,710). Regarding claims 25-26, Son discloses substantially all features of the claimed invention except at least one ferrite core located below the working coil. Moon discloses at least one ferrite core located below the working coil (col. 12, lines 40-41). It would have been obvious to one ordinary skill in the art before the effective filling date of the invention was made to utilize in Son as taught by Moon in order to increase magnetic flux and to make the coil more efficient. Regarding claim 26, Moon discloses a limitation the working coil has a rectangular perimeter col. 38, lines 29-41). Claims 20-21 and 27 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. Any inquiry concerning this communication or earlier communications from the examiner should be directed to QUANG T VAN whose telephone number is (571)272-4789. The examiner can normally be reached Mon-Fri 9:00-6:00. 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, Steven W Crabb can be reached at 571-270-5095. 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. /QUANG T VAN/Primary Examiner, Art Unit 3761 July 23, 2026
Read full office action

Prosecution Timeline

Jan 16, 2024
Application Filed
Jul 28, 2026
Non-Final Rejection mailed — §103 (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

1-2
Expected OA Rounds
74%
Grant Probability
82%
With Interview (+8.4%)
3y 5m (~10m remaining)
Median Time to Grant
Low
PTA Risk
Based on 1099 resolved cases by this examiner. Grant probability derived from career allowance rate.

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