Prosecution Insights
Last updated: April 19, 2026
Application No. 18/114,471

SPOT WELDING MONITORING METHOD AND SPOT WELDING MONITORING SYSTEM

Non-Final OA §103
Filed
Feb 27, 2023
Examiner
BACHNER, ROBERT G
Art Unit
2898
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
Subaru Corporation
OA Round
1 (Non-Final)
88%
Grant Probability
Favorable
1-2
OA Rounds
2y 6m
To Grant
94%
With Interview

Examiner Intelligence

Grants 88% — above average
88%
Career Allow Rate
737 granted / 838 resolved
+19.9% vs TC avg
Moderate +6% lift
Without
With
+6.5%
Interview Lift
resolved cases with interview
Typical timeline
2y 6m
Avg Prosecution
32 currently pending
Career history
870
Total Applications
across all art units

Statute-Specific Performance

§101
4.7%
-35.3% vs TC avg
§103
53.3%
+13.3% vs TC avg
§102
18.7%
-21.3% vs TC avg
§112
14.9%
-25.1% vs TC avg
Black line = Tech Center average estimate • Based on career data from 838 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 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 1-6 are rejected under 35 U.S.C. 103 as being unpatentable over Endoh (U.S. Patent Application Publication No. 2019/02101059) in view of Lee (U.S. Patent Application Publication No. 2002/0101234). Regarding claim 1. Endoh discloses: A spot welding monitoring method configured to monitor a state of spot welding that holds a work comprising metal plates stacked([0114]) on each other, between electrodes in a pair(abstract 303 304), and supplies electricity between the electrodes([0114]), the spot welding monitoring method comprising: by a converter (205)disposed in a vicinity of a weld zone of the work, detecting a change in magnetic flux density(Fig. 20b, and [0184] c101) of a magnetic field generated around the weld zone by the supplying of the electricity between the electrodes([0185]), and converting the change in the magnetic flux density into a current([0185],[0186]); and calculating three-dimensional data on a melting zone of the work, based on a temporal change in a value of the current([0215]). Endoh discloses does not disclose: calculating three-dimensional data on a melting zone of the work Endoh discloses that the device may include a magnetic field measuring unit, and that the unit provides data on the melting zone of the work. However, Endoh discloses that the data analysis unit 103 shown in fig. 1 takes the collected data, including the magnetic data, and uses it to analysis the data, using machine learning, and uses other classification techniques. It further determines if welding conditions are normal or abnormal, see [0070], and outputs detailed inspection instructions, and creates one-dimensional data at [0027]-[0029] [0150]-[0151] [0256]. Further, in related art, Lee discloses amplifying the magnetic flux density, to make three dimensional data for the benefit of displaying the magnetic flux to display internal properties[0053]. It would have been obvious to use the amplifying of the Magnetic flux density for the obvious benefit of viewing a defect of the melting zone of Endoh. Thus, It would have been obvious to use the data to calculate three-dimensional data as taught by Lee in the device of Endoh, for the benefit of using the data to create detailed inspection instructions, and non-destructive views of the melting zone. As such, the features of claim 1 would have been obvious to one having ordinary skill in the art. Regarding claim 2. Endoh discloses all of the features of claim 1. Endoh does not disclose: The spot welding monitoring method according to claim 1, wherein the detecting and converting of the change in the magnetic flux density comprises amplifying the magnetic flux density of the magnetic field generated around the weld zone, by a magnetic field generator disposed in a vicinity of the weld zone. In related art, Lee discloses: The spot welding monitoring method according to claim 1, wherein the detecting and converting of the change in the magnetic flux density comprises amplifying the magnetic flux density of the magnetic field generated around the weld zone, by a magnetic field generator disposed in a vicinity of the weld zone. [0053], disclosing amplifying magnetic flux density data for non-destructive testing.. IT would have been obvious to use the amplifying of the Magnetic flux density for the obvious benefit of viewing a defect of the melting zone of Endoh. Thus, It would have been obvious to use the data to calculate three-dimensional data as taught by Lee in the device of Endoh, for the benefit of using the data to create detailed instructions and providing inspection of the melting zone properties. As such, the features of claim 2 would have been obvious to one having ordinary skill in the art. Regarding claim 3. Endoh discloses The spot welding monitoring method according to claim 1, further comprising determining whether quality of the weld zone is favorable or unfavorable, by comparing the calculated three-dimensional data and preset weld zone reference data. (see [0261]-[0262], unit 106 determines if it is normal or abnormal by comparing the obtained data to reference data) Regarding claim 4. Endoh discloses The spot welding monitoring method according to claim 2, further comprising determining whether quality of the weld zone is favorable or unfavorable, by comparing the calculated three-dimensional data and preset weld zone reference data. (see [0261]-[0262], unit 106 determines if it is normal or abnormal by comparing the obtained data to reference data) Regarding claim 5. Endoh discloses: A spot welding monitoring system configured to monitor a state of spot welding that holds a work comprising metal plates stacked ([0114]) on each other, between electrodes in a pair(abstract 303 304),, and supplies electricity between the electrodes([0114]),, the spot welding monitoring system comprising: calculating three-dimensional data on a melting zone of the work, based on a temporal change in a value of the current Endoh discloses does not disclose: a converter (205)configured to be disposed in a vicinity of a weld zone of the work, and to detect a change in magnetic flux density(Fig. 20b, and [0184] c101) of a magnetic field generated around the weld zone by the supplying of the electricity between the electrodes([0185]),, and convert the change in the magnetic flux density into a current([0185],[0186]);; and a calculation device configured to calculate three-dimensional data on a melting zone of the work, based on a temporal change in a value of the current acquired by the converter. ([0215]). Endoh discloses that the device may include a magnetic field measuring unit, and that the unit provides data on the melting zone of the work. However, Endoh discloses that the data analysis unit 103 shown in fig. 1 takes the collected data, including the magnetic data, and uses it to analysis the data, using machine learning, and uses other classification techniques. It further determines if welding conditions are normal or abnormal, see [0070], and outputs detailed inspection instructions, and creates one-dimensional data at [0027]-[0029] [0150]-[0151] [0256]. Further, in related art, Lee discloses amplifying the magnetic flux density, to make three dimensional data for the benefit of displaying the magnetic flux to display internal properties[0053]. IT would have been obvious to use the amplifying of the Magnetic flux density for the obvious benefit of viewing a defect of the melting zone of Endoh. Thus, It would have been obvious to use the data to calculate three-dimensional data as taught by Lee in the device of Endoh, for the benefit of using the data to create detailed inspection instructions, and views of the melting zone structure. As such, the features of claim 5 would have been obvious to one having ordinary skill in the art. Regarding claim 6. Endoh discloses all of the features of claim 5. Endoh does not disclose: The spot welding monitoring system according to claim 5, further comprising a magnetic field generator configured to be disposed in a vicinity of the weld zone, and to amplify magnetic flux generated around the weld zone. In related art, Lee discloses: The spot welding monitoring system according to claim 5, further comprising a magnetic field generator configured to be disposed in a vicinity of the weld zone, and to amplify magnetic flux generated around the weld zone. [0053], disclosing amplifying magnetic flux density data for non-destructive testing. IT would have been obvious to use the amplifying of the Magnetic flux density for the obvious benefit of viewing a defect of the melting zone of Endoh. Thus, It would have been obvious to use the data to calculate three-dimensional data as taught by Lee in the device of Endoh, for the benefit of using the data to create detailed instructions and providing inspection of the melting zone properties. As such, the features of claim 6 would have been obvious to one having ordinary skill in the art. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to ROBERT G BACHNER whose telephone number is (571)270-3888. The examiner can normally be reached on Monday-Friday, 10-6 EST. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Ajay Ojha can be reached at (571)273-8936. 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. /ROBERT G BACHNER/Primary Examiner, Art Unit 2898
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Prosecution Timeline

Feb 27, 2023
Application Filed
Dec 04, 2025
Non-Final Rejection — §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
88%
Grant Probability
94%
With Interview (+6.5%)
2y 6m
Median Time to Grant
Low
PTA Risk
Based on 838 resolved cases by this examiner. Grant probability derived from career allow rate.

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