Prosecution Insights
Last updated: October 27, 2026
Application No. 19/486,108

FRICTION STIR SPOT WELDING TOOL

Non-Final OA §103§112
Filed
Nov 20, 2025
Priority
May 22, 2023 — JP 2023-084103 +1 more
Examiner
SAAD, ERIN BARRY
Art Unit
1735
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Kawasaki Heavy Industries Ltd.
OA Round
1 (Non-Final)
72%
Grant Probability
Favorable
1-2
OA Rounds
1y 6m
Est. Remaining
84%
With Interview

Examiner Intelligence

Grants 72% — above average
72%
Career Allowance Rate
933 granted / 1288 resolved
+7.4% vs TC avg
Moderate +11% lift
Without
With
+11.4%
Interview Lift
resolved cases with interview
Typical timeline
2y 6m
Avg Prosecution
43 currently pending
Career history
1339
Total Applications
across all art units

Statute-Specific Performance

§101
0.2%
-39.8% vs TC avg
§103
45.6%
+5.6% vs TC avg
§102
19.7%
-20.3% vs TC avg
§112
27.3%
-12.7% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1288 resolved cases

Office Action

§103 §112
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 § 112 The following is a quotation of 35 U.S.C. 112(b): (b) CONCLUSION.—The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the inventor or a joint inventor regards as the invention. The following is a quotation of 35 U.S.C. 112 (pre-AIA ), second paragraph: The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the applicant regards as his invention. Claims 8-9 are rejected under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), second paragraph, as being indefinite for failing to particularly point out and distinctly claim the subject matter which the inventor or a joint inventor (or for applications subject to pre-AIA 35 U.S.C. 112, the applicant), regards as the invention. Claim 8 is indefinite because there is a plurality of steps in claim 3. Claim 8 only refers to one step. Which step of the plurality of steps has the height difference? The Examiner requests that the Applicant please clarify. Claim 9 is indefinite because there is a plurality of steps in claim 4. Claim 9 only refers to one step. Which step of the plurality of steps has the height difference? The Examiner requests that the Applicant please clarify. 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. Claim(s) 1, 2, 6 are is/are rejected under 35 U.S.C. 103 as being unpatentable over Okada et al. (2021/0331421A1) in view of Rosal et al. (2019/0151982). Regarding claim 1, Okada discloses a friction stir spot welding tool, comprising: a cylindrical pin 11 that rotates about an axis; a shoulder 12 having a hollow portion into which the pin is inserted; and a driving unit 53 that performs driving of press-fitting the pin into a joining object while rotating the pin and driving of retracting the shoulder with respect to the joining object (figures 1-4, paragraphs 0028-0103). Okada is silent to a step-shaped portion forming a step in a rotation direction of the pin is provided on at least a part of a tip surface of the pin. However, Rosal discloses a friction stir pin 912 with a step-shaped portion 966 forming a step in a rotation direction of the pin is provided on at least a part of a tip surface of the pin (figure 9, paragraph 0052). To one skilled in the art at the time of the invention it would have been obvious to have a step-shaped portion as taught in Rosal because Rosal states that engages with and moves a greater amount of workpiece material than a conventional tool (paragraph 0032). This would help ensure that the workpiece material is properly joined. Regarding claim 2, Rosal discloses that the step of the step-shaped portion is a radial step extending in a radial direction from a center point of the tip surface to an outer peripheral edge (figure 9). Regarding claim 6, the limitation “wherein the step of the step-shaped portion is a step formed by cutting out a part of an outer peripheral edge of the tip surface” is product by process and does not further limit the apparatus. Claim(s) 1-9 are is/are rejected under 35 U.S.C. 103 as being unpatentable over Okada et al. (2021/0331421A1) in view of Rosal et al. (2019/0151982). This is an alternate rejection using the same art, but different embodiment Regarding claim 1, Okada discloses a friction stir spot welding tool, comprising: a cylindrical pin 11 that rotates about an axis; a shoulder 12 having a hollow portion into which the pin is inserted; and a driving unit 53 that performs driving of press-fitting the pin into a joining object while rotating the pin and driving of retracting the shoulder with respect to the joining object (figures 1-4, paragraphs 0028-0103). Okada is silent to a step-shaped portion forming a step in a rotation direction of the pin is provided on at least a part of a tip surface of the pin. However, Rosal discloses a friction stir pin 1012 with a step-shaped portion forming a step (two extending portions are steps) in a rotation direction of the pin is provided on at least a part of a tip surface of the pin (figure 10, paragraph 0054). To one skilled in the art at the time of the invention it would have been obvious to have a step-shaped portion as taught in Rosal because Rosal states that engages with and moves a greater amount of workpiece material than a conventional tool (paragraph 0032). This would help ensure that the workpiece material is properly joined. Regarding claim 2, Rosal discloses that the step of the step-shaped portion is a radial step extending in a radial direction from a center point of the tip surface to an outer peripheral edge (figure 10). Regarding claim 3, Rosal discloses a plurality of the radial steps (two steps, figure 10) are arranged in a circumferential direction of the tip surface of the pin (figure 10). Regarding claim 4, Rosal discloses that the plurality of radial steps are arranged at equal intervals in a circumferential direction of the tip surface (paragraph 0054, figure 10). Regarding claim 5, Rosal discloses a maximum height difference of the step of the step-shaped portion is set in a range from 1% to 10% of a diameter of the pin (paragraph 0037). Regarding claim 6, the limitation “wherein the step of the step-shaped portion is a step formed by cutting out a part of an outer peripheral edge of the tip surface” is product by process and does not further limit the apparatus. Regarding claim 7, Rosal discloses a maximum height difference of the step of the step-shaped portion is set in a range from 1% to 10% of a diameter of the pin (paragraph 0037). Regarding claim 8, Rosal discloses a maximum height difference of the step of the step-shaped portion is set in a range from 1% to 10% of a diameter of the pin (paragraph 0037). Regarding claim 9, Rosal discloses a maximum height difference of the step of the step-shaped portion is set in a range from 1% to 10% of a diameter of the pin (paragraph 0037). Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to ERIN B SAAD whose telephone number is (571)270-3634. The examiner can normally be reached Monday-Thursday 7:30a-6p. 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, Keith Walker can be reached at 571-272-3458. 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. /ERIN B SAAD/Primary Examiner, Art Unit 1735
Read full office action

Prosecution Timeline

Nov 20, 2025
Application Filed
Sep 14, 2026
Non-Final Rejection mailed — §103, §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12766631
FRICTION STIR WELDING METHOD
2y 2m to grant Granted Oct 20, 2026
Patent 12759094
BOND HEAD HEATER INCORPORATING FLUID CHAMBER FOR COOLING
2y 5m to grant Granted Oct 13, 2026
Patent 12746616
SOLID-STATE JOINING METHOD, SOLID-STATE JOINED JOINT, SOLID-STATE JOINED STRUCTURE, AND SOLID-STATE JOINING DEVICE
2y 8m to grant Granted Sep 29, 2026
Patent 12734603
DISSIMILAR MATERIAL SOLID PHASE BONDING METHOD, AND DISSIMILAR MATERIAL SOLID PHASE BONDED STRUCTURE
4y 7m to grant Granted Sep 15, 2026
Patent 12734601
WIRE BONDING SYSTEMS, WIRE REPLACEMENT SYSTEMS, AND RELATED METHODS
1y 10m to grant Granted Sep 15, 2026
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
72%
Grant Probability
84%
With Interview (+11.4%)
2y 6m (~1y 6m remaining)
Median Time to Grant
Low
PTA Risk
Based on 1288 resolved cases by this examiner. Grant probability derived from career allowance rate.

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