Prosecution Insights
Last updated: October 02, 2026
Application No. 18/978,287

FRICTION STIR WELDING (FSW) APPARATUS AND TECHNIQUES

Final Rejection §103
Filed
Dec 12, 2024
Priority
Dec 12, 2023 — provisional 63/609,104
Examiner
SAAD, ERIN BARRY
Art Unit
1735
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Battelle Memorial Institute
OA Round
2 (Final)
72%
Grant Probability
Favorable
3-4
OA Rounds
8m
Est. Remaining
84%
With Interview

Examiner Intelligence

Grants 72% — above average
72%
Career Allowance Rate
930 granted / 1285 resolved
+7.4% vs TC avg
Moderate +12% lift
Without
With
+11.5%
Interview Lift
resolved cases with interview
Typical timeline
2y 6m
Avg Prosecution
48 currently pending
Career history
1329
Total Applications
across all art units

Statute-Specific Performance

§101
0.3%
-39.7% vs TC avg
§103
45.4%
+5.4% vs TC avg
§102
19.4%
-20.6% vs TC avg
§112
27.4%
-12.6% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1285 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. Claim(s) 13, 16-18 is/are rejected under 35 U.S.C. 103 as being unpatentable over Odakura et al. (2018/0071860A1) in view of Subramanian et al. (2005/0045695A1). Regarding claim 13, Odakura discloses an apparatus, the apparatus comprising: a support arm 10e coupled with or comprising a spindle housing 20; and a tool 2, the tool comprising a pin 2b protruding outward from a face of the tool; wherein tool is oriented to extend laterally outward from the support arm (figures 1-2); wherein the forging force is transmitted through the support arm and spindle housing to the spindle shaft (through control device 30); and wherein the rotation of the spindle shaft is mechanically driven through the support arm (figure 1, paragraphs 0046-0057, 0070, 0094-0111). As shown in figure 1, the control device is connected to the base of the robot arm. The control device controls the movement of the robot arm, rotation, and force being applied. Therefore, it is the Examiner’s position that the forging force is transmitted through the support arm and housing to the shaft. There are different types of rotation occurring with the tool of Odakura. One type of rotation corrus when the support arm 10e is rotated about the B axis (see rotation arrows in the figure 1). Since the support arm 10e is mechanically rotating the spindle (and the entire tool 20), the limitation is met. Odakura does not specifically disclose a spindle shaft supported by the spindle housing the tool removably coupled to the spindle shaft the spindle shaft oriented to extend laterally outward from the support arm. However, Subramanian discloses a friction stir welding tool with a spindle shaft (top part, opposite the pin 12, that is holding the shank 20) in a spindle housing 24 with a pin 12 (figure 1). To one skilled in the art at the time of the invention it would have been obvious to have a spindle shaft as it is attached to a drive mechanism that rotates and extends the pin. The spindle shaft allows the user to extend the pin outside of the housing to a desired distance based on the required welding process. The term “removably” does not further limit the structure. The tool is capable of being removed to the spindle shaft. The limitation “for performing friction stir welding (FSW) on an interior face of a workpiece” is intended use and does not further limit the structure of the apparatus. It is the Examiner’s position that the apparatus of Odakura would be capable of friction stir welding on an interior face of a workpiece. The limitation “to engage an interior face of a workpiece where a forging force and rotation between a tool and the workpiece are established” is functional and does not further limit the structure of the apparatus. Since the prior art discloses the claimed structure it is the Examiner’s position that the prior art is capable of performing the claimed function. The limitation “and wherein the support arm, spindle shaft, spindle housing, and tool are sized and shaped to fit within a cross section defined by the workpiece when extended within the workpiece by the support arm” is functional and dependent on the material worked upon. This limitation does not further limit the structure of the apparatus. Since the prior art discloses the claimed structure it is the Examiner’s position that the prior art is capable of performing the claimed function. Regarding claim 16, Subramanian discloses wherein the tool comprises: a shank 20 configured to be engaged by a tool holder 28; and a face defined by a body of the tool, the face defining a shoulder 16 extending along the face from an edge of the tool inward toward a center of the face; a pin 12 protruding outward from the face of the tool centered at the center of the face; and at least one spiral (threads) feature defined by a protrusion extending outward or a recess extending inward from a face of the tool in an axial direction parallel to the forging force, the at least one spiral feature located between the shoulder and the pin (figures 1-2). Regarding claim 17, Subramanian discloses that the pin comprises two or more flat regions on an outer diameter of the pin (figure 2 (top view shows at least two flat regions, paragraph 0017)). Regarding claim 18, Subramanian discloses an outer diameter of the pin 12 comprises one or more sets of ridges or grooves (threads) extending at least partially circumferentially around the pin (figure 2). Claim(s) 15 is/are rejected under 35 U.S.C. 103 as being unpatentable over Odakura et al. (2018/0071860A1) in view of Subramanian et al. (2005/0045695A1) as applied to claim 13 above, and further in view of Yamamoto et al. (2018/0178293A1). Regarding claim 15, Okadura does not specifically disclose wherein the spindle shaft is mechanically coupled with a wireless transmitter, the wireless transmitter configured to transmit data indicative of one or more monitored parameters, the one or more monitored parameters comprising a temperature, a rotational velocity associated with the tool, a rotational position of the tool, a force associated with the tool, or combinations thereof. However, Yamamoto discloses a friction stir welding tool wherein wireless transmitter is mechanically coupled to a spindle shaft and is used to monitor temperature, vibration and movement of the axis (figures 1, 5, abstract, paragraphs 0001, 0056-0062, 0087-0095). To one skilled in the art at the time of the invention it would have been obvious to use a wireless transmitter to monitor parameters because it allows the user to monitor the tool in real time to ensure that there is no damage or over heating occurring during the bonding process. Response to Arguments Applicant's arguments filed 7/30/2026 have been fully considered but they are not persuasive. The Applicant argues that Odakura’s control device controls the movement of the robot arm, rotation and force. The Applicant argues that the rotation of the spindle shaft is mechanically driven through the support arm and that Odakura is silent to the rotation of the spindle shaft being mechanically driven through the support arm. The Applicant argues that the rotation of the spindle can be rotated using a drive belt. The Examiner disagrees. Odakura discloses that there is a control device for moving the tool. The arm 10e rotates (rotation arrows, figure 1) about the B axis (paragraph 0042) to rotate the tool 20 by way of the linkage used to join the arm 10e (where the B axis line goes through). The linkage creates a mechanical movement of the tool (that includes the spindle) through the arm 10e. The Applicant’s argument regarding the drive belt is moot as it is not commensurate in scope with the claimed invention. There are different types of rotation occurring. If the Applicant is attempting to claim the spinning of the pin to form the weld then the claim should be amended to state this limitation. The Applicant argues that to engage an interior face of a workpiece where a forging force and rotation between a tool and the workpiece are established” is not functional and that the prior art does not teach or suggest such a configuration or use, and as applied. The Examiner disagrees. The workpiece is material worked upon and does not further limit the apparatus. Furthermore, the functional language also does not further limit the apparatus. The tool of Okada is capable of being used for the claimed function. Conclusion Applicant's amendment necessitated the new ground(s) of rejection presented in this Office action. Accordingly, THIS ACTION IS MADE FINAL. See MPEP § 706.07(a). Applicant is reminded of the extension of time policy as set forth in 37 CFR 1.136(a). A shortened statutory period for reply to this final action is set to expire THREE MONTHS from the mailing date of this action. In the event a first reply is filed within TWO MONTHS of the mailing date of this final action and the advisory action is not mailed until after the end of the THREE-MONTH shortened statutory period, then the shortened statutory period will expire on the date the advisory action is mailed, and any nonprovisional extension fee (37 CFR 1.17(a)) pursuant to 37 CFR 1.136(a) will be calculated from the mailing date of the advisory action. In no event, however, will the statutory period for reply expire later than SIX MONTHS from the mailing date of this final action. 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

Dec 12, 2024
Application Filed
Mar 30, 2026
Non-Final Rejection mailed — §103
Jul 30, 2026
Response Filed
Sep 21, 2026
Final Rejection mailed — §103 (current)

Precedent Cases

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Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

3-4
Expected OA Rounds
72%
Grant Probability
84%
With Interview (+11.5%)
2y 6m (~8m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 1285 resolved cases by this examiner. Grant probability derived from career allowance rate.

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