Prosecution Insights
Last updated: July 17, 2026
Application No. 18/048,969

Magnet with Multiple Discs

Non-Final OA §103
Filed
Oct 24, 2022
Priority
Oct 09, 2019 — provisional 62/912,969 +1 more
Examiner
HOMZA, LISA NHUNG
Art Unit
2837
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
Power Integrations Inc.
OA Round
7 (Non-Final)
87%
Grant Probability
Favorable
7-8
OA Rounds
0m
Est. Remaining
88%
With Interview

Examiner Intelligence

Grants 87% — above average
87%
Career Allowance Rate
683 granted / 788 resolved
+18.7% vs TC avg
Minimal +1% lift
Without
With
+1.3%
Interview Lift
resolved cases with interview
Fast prosecutor
2y 2m
Avg Prosecution
52 currently pending
Career history
811
Total Applications
across all art units

Statute-Specific Performance

§103
67.9%
+27.9% vs TC avg
§102
9.8%
-30.2% vs TC avg
§112
9.8%
-30.2% vs TC avg
Black line = Tech Center average estimate • Based on career data from 788 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 . Reopening of Prosecution After Appeal Brief In view of the Appeal Brief filed on or after 3/10/26, PROSECUTION IS HEREBY REOPENED. A new ground of non-final rejection is set forth below. To avoid abandonment of the application, appellant must exercise one of the following two options: (1) file a reply under 37 CFR 1.111 (if this Office action is non-final) or a reply under 37 CFR 1.113 (if this Office action is final); or, (2) initiate a new appeal by filing a notice of appeal under 37 CFR 41.31 followed by an appeal brief under 37 CFR 41.37. The previously paid notice of appeal fee and appeal brief fee can be applied to the new appeal. If, however, the appeal fees set forth in 37 CFR 41.20 have been increased since they were previously paid, then appellant must pay the difference between the increased fees and the amount previously paid. A Supervisory Patent Examiner (SPE) has approved of reopening prosecution by signing below: /SHAWKI S ISMAIL/Supervisory Patent Examiner, Art Unit 2837 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 15 and 17-35 are rejected under 35 U.S.C. 103 as being unpatentable over Lin et al. (US 2014/0085030) in view of Fullerton et al. (US 8,179,219), Figures 20D and 51B, further in view of Zejing Wang (CN102055382B). Regarding claims 15, 25-27, Lin discloses a transformer comprising: a core (1, 12) of magnetically active material, the core comprising: a first portion (120, 124), a second portion (121, 124), and an air gap (13) between the first portion (120, 124) and the second portion (121, 124), a wire (14 and 1) that encircles one of the first portion (120, 124) and the second portion (121, 124) of the core (1, 12). Lin does not disclose the composite disc magnet, the composite magnet, the composite magnet housed in the air gap between the first portion and the second portion of the core; and the composite magnet comprising a plurality of discs, and a face of each of the plurality of discs is substantially perpendicular to a central axis of the composite disc magnet. Fullerton discloses a field emission system comprising: the composite disc magnet (1802a, 1802b, Fig. 20D) and (5102, 4002c, Figure 51A), the composite magnet housed in the air gap (see the Fig. 20D below, and (the space between 5106a, 5106b, Fig. 51A) between the first portion (2036) and the second portion (2048); and the composite magnet (1802a, 1802b, Fig. 20D), comprising a plurality of discs, and a face of each of the plurality of discs is substantially perpendicular to a central axis (see the drawing below) of the composite disc magnet (1802a, 1802b, Fig. 20D). PNG media_image1.png 213 190 media_image1.png Greyscale PNG media_image2.png 270 237 media_image2.png Greyscale Annotated FIG. 20D of Fullerton Annotated FIG. 51A of Fullerton It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to use the composite disc magnet as taught by Fullerton with the material (17) of Lin for the purpose of producing strong magnetic field. Lin and Fullerton do not disclose each of the plurality of discs are polarized in the same direction. Wang discloses a device comprising the permanent magnet magnetized in the same direction (see the abstract). It would have been obvious to one of ordinary skill in the art, before the effective filing date of the claimed invention to make the permanent magnet magnetized in the same direction as taught by Wang with Lin’s device for the purpose of producing stronger vibrations, and operating efficiently. Regarding claims 17 and 28, Lin discloses: a bobbin (11) that holds the wire (15). Regarding claims 18 and 29, Fullerton discloses: the first plurality of discs (1802a, 1802b, Fig. 20D) disposed around the central axis of the composite disc magnet in a bundled rod construction (2062) and each disc of the plurality of discs is electrically insulated from every other disc. Regarding claims 19-21 and 30-32, Fullerton discloses the depth, the size and the shape of each of the plurality of discs (1802a, 1802b, Fig. 20D) is substantially the same. PNG media_image3.png 217 288 media_image3.png Greyscale Regarding claims 22 and 33, Lin discloses: the second portion (121, 124) of the core (1 and 12) further comprises a center post (123), and Fullerton discloses the composite magnet (1802a, 1802b, Fig. 20D). It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to place the composite magnet is substantially positioned onto the center post (123) and within an outer boundary of the center post (123) of Lin for the purpose of producing magnetic field. Regarding claims 23 and 34, Fullerton discloses: the gaps between each of the plurality of discs (1802a, 1802b, Fig. 20D) and the outer boundary are filled with an insulating fill (such as air). Regarding claims 24 and 35: Although Fullerton does not explicitly disclose that each of the plurality of discs is coated with an insulating material, it would have been obvious to one of ordinary skill in the art, before the effective filing date of the claimed invention to use the method of ultraviolet curing glue, heating and coating (see col. 33, lines 48-57) to cover the discs for the purpose of having better performance. Response to Arguments Applicant's arguments filed 3/10/26 have been fully considered but they are moot. Conclusion Any inquiry concerning this communication should be directed to Lisa Homza whose telephone number is (571) 272-3592. If attempts to reach the examiner by telephone are unsuccessful, the examiner's supervisor, Shawki Ismail can be reached on (571) 272-3985. 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 http://pair-direct.uspto.gov. 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. /Lisa Nhung Homza/ Patent Examiner - Art Unit 2837 May 19, 2026 /SHAWKI S ISMAIL/Supervisory Patent Examiner, Art Unit 2837
Read full office action

Prosecution Timeline

Show 13 earlier events
Jun 17, 2025
Non-Final Rejection mailed — §103
Aug 20, 2025
Response Filed
Oct 17, 2025
Final Rejection mailed — §103
Dec 15, 2025
Response after Non-Final Action
Jan 16, 2026
Notice of Allowance
Mar 10, 2026
Response after Non-Final Action
Mar 28, 2026
Response after Non-Final Action
Jun 25, 2026
Non-Final Rejection mailed — §103 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12671021
ELECTROMAGNETIC ACTUATOR
3y 1m to grant Granted Jun 30, 2026
Patent 12658393
Relay Static Terminal, Terminal Assembly and Relay
2y 6m to grant Granted Jun 16, 2026
Patent 12640322
RELAY MOVABLE SPRING CAPABLE OF REDUCING TEMPERATURE RISE AND RELAY
2y 11m to grant Granted May 26, 2026
Patent 12640298
SOLENOID ACTUATOR AND MULTI-SOLENOID ACTUATOR EXERTING CONSTANT FORCE
3y 1m to grant Granted May 26, 2026
Patent 12633482
MOVABLE CONTACT PART AND DIRECT CURRENT RELAY COMPRISING SAME
3y 0m to grant Granted May 19, 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

7-8
Expected OA Rounds
87%
Grant Probability
88%
With Interview (+1.3%)
2y 2m (~0m remaining)
Median Time to Grant
High
PTA Risk
Based on 788 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