Prosecution Insights
Last updated: April 19, 2026
Application No. 18/370,250

STRETCHER WITH REMOVABLE PRESSURE BLOCK

Final Rejection §103
Filed
Sep 19, 2023
Examiner
ALAWADI, MOHAMMED S
Art Unit
3725
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
Butech Inc.
OA Round
2 (Final)
74%
Grant Probability
Favorable
3-4
OA Rounds
2y 8m
To Grant
99%
With Interview

Examiner Intelligence

Grants 74% — above average
74%
Career Allow Rate
510 granted / 692 resolved
+3.7% vs TC avg
Strong +25% interview lift
Without
With
+25.0%
Interview Lift
resolved cases with interview
Typical timeline
2y 8m
Avg Prosecution
61 currently pending
Career history
753
Total Applications
across all art units

Statute-Specific Performance

§101
0.2%
-39.8% vs TC avg
§103
35.3%
-4.7% vs TC avg
§102
22.8%
-17.2% vs TC avg
§112
38.0%
-2.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 692 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 . Response to Arguments Applicant’s arguments with respect to claims 1 and 11 have been considered but are moot because the new ground of rejection does not rely on any reference applied in the prior rejection of record for any teaching or matter specifically challenged in the argument. 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. Claims 1-7, 9-16 and 18-19 are rejected under 35 U.S.C. 103 as being unpatentable over Voges (US4751838A) in view of Sato (US20200360975A1). Regarding claims 1 and 9-10, Voges discloses a stretcher (abstract and cols.6-8) with a pressure block assembly (fig.1 (50); comprising: a head housing (fig.1: the housing between elements (2) and (4)); a pressure block assembly (fig.1 (50)) which is located in said housing and positioned within said housing via hydraulic cylinders; said hydraulic cylinders (fig.1: (64) and (66)) raise said pressure block assembly; and said hydraulic cylinders lower said pressure block assembly to move said pressure block assembly out of said housing. Regarding claims 1 and 9-10, Voges does not disclose a removal fixture comprising rollers which is rolled into position via a convevor extending into the housing under said pressure block assembly to receive the pressure block assembly which is lowered onto the removal fixture for removal of the pressure block assembly from the housing; wherein said hydraulic cylinders lower said pressure block assembly onto said removal fixture; and a mechanism to pull said pressure block assembly out of said head housing. Sato teaches a removal fixture (figs.3-5: (30)) comprising rollers (see the rollers of the element (30)) which is rolled into position via a convevor (figs.3-5: (31)) extending into a housing (figs.3-5: the housing of the element (A)) for removal of a processing block assembly from the housing (paragraphs 0051-0052); and a mechanism to pull said processing block assembly out of said head housing (paragraph 92). Therefore, it would have been obvious to one having ordinary skill in the art before the effective filing date of the claimed invention to modify the apparatus of Voges by the configuration of a removal fixture comprising rollers which is rolled into position via a convevor extending into a housing as taught by Sato in order to allow prompt machine changing (Sato: paragraph 0024), thereby having a removal fixture comprising rollers which is rolled into position via a convevor extending into the housing under said pressure block assembly to receive the pressure block assembly which is lowered onto the removal fixture for removal of the pressure block assembly from the housing; and wherein said hydraulic cylinders lower said pressure block assembly onto said removal fixture; and a mechanism to pull said processing block assembly out of said head housing. Regarding claim 2, Voges discloses a window formed in a wall of said housing (fig.1: the window of the housing between elements (2) and (4)) for accessing gripper plates (fig.6: (72) and (74)) within said housing for removal of said gripper plates (Voges does not explicitly disclose removal; however, it would have been obvious to one of ordinary skill in the art at the time of the invention was made to Voges in view of Sato to make the gripper plates to be removable for the purpose of the maintenance and repairing, since it has been held that if it were considered desirable for any reason to obtain access to the breaker members of Blackwell’s. In re Dulberg, 289 F.2d 522, 523, 129 USPQ 348, 349 (CCPA 1961). Regarding claim 3, Voges discloses wherein said gripper plates comprises upper gripper plates and lower gripper plates (figs.3 and 6: (72) and (74)). Therefore, the modification of Voges in view of Sato the limitations of claim 3. Regarding claim 4, Voges discloses wherein said lower gripper plates (figs.3 and 6: (72)) remain fixed in said housing. Therefore, the modification of Voges in view of Sato the limitations of claim 4. Regarding claim 5, Voges discloses wherein said upper gripper plates (figs.3 and 6: (74)) move up and down relative to said housing. Therefore, the modification of Voges in view of Sato the limitations of claim 5. Regarding claim 6, Voges discloses wherein said pressure block assembly comprises at least one piston which applies gripping force through said upper gripping plate onto said lower gripping plates (fig.3: the piston rods of the hydraulic cylinders (64) and (66)). Therefore, the modification of Voges in view of Sato the limitations of claim 6. Regarding claim 7, Voges discloses wherein said pressure block assembly further comprises hydraulic piping for providing hydraulic fluid to said at least one piston (col.9 lines 3-5). Therefore, the modification of Voges in view of Sato the limitations of claim 7. Regarding claims 11 and 18-19, Voges discloses a stretcher (abstract and cols.6-8) with a pressure block assembly (fig.1 (50); comprising: a head housing (fig.1: the housing between elements (2) and (4)) having a window in a side wall (fig.1: the window of the housing between elements (2) and (4)) to access gripper plates (fig.6: (72) and (74)); a pressure block assembly (fig.1 (50)) which is located in said housing and positioned by hydraulic cylinders (fig.1: (64) and (66)) which raise the pressure block assembly and lower said pressure block assembly for removing said pressure block assembly from said head housing (fig.1 (50)). Regarding claims 11 and 18-19, Voges does not disclose a removable fixture having rollers which is rolled into position via a conveyor extending into the housing under said pressure block assembly to receive the pressure block assembly which is lowered onto the removal fixture for removal of the pressure block assembly from the housing; and herein said hydraulic cylinders are used to lower said pressure block assembly onto said removal fixture; and a mechanism to pull or push said pressure block assembly out of said head housing. Sato teaches a removal fixture (figs.3-5: (30)) having rollers (see the rollers of the element (30)) which is rolled into position via a convevor (figs.3-5: (31)) extending into a housing (figs.3-5: the housing of the elemnet (A)) for removal of a processing block assembly from the housing (paragraphs 0051-0052); and a mechanism to pull said processing block assembly out of said head housing (paragraph 92). Therefore, it would have been obvious to one having ordinary skill in the art before the effective filing date of the claimed invention to modify the apparatus of Voges by the configuration of a removal fixture having rollers which is rolled into position via a convevor extending into a housing as taught by Sato in order to allow prompt machine changing (Sato: paragraph 0024), thereby having a removable fixture having rollers which is rolled into position via a conveyor extending into the housing under said pressure block assembly to receive the pressure block assembly which is lowered onto the removal fixture for removal of the pressure block assembly from the housing; and herein said hydraulic cylinders are used to lower said pressure block assembly onto said removal fixture. Regarding claim 12, Voges discloses wherein said gripper plates comprises upper gripper plates and lower gripper plates (figs.3 and 6: (72) and (74)). Therefore, the modification of Voges in view of Sato the limitations of claim 12. Regarding claim 13, Voges discloses wherein said lower gripper plates (figs.3 and 6: (72)) remain fixed relative to said head housing. Therefore, the modification of Voges in view of Sato the limitations of claim 13. Regarding claim 14, Voges discloses wherein said upper gripper plates (figs.3 and 6: (74)) move up and down relative to said head housing. Therefore, the modification of Voges in view of Sato the limitations of claim 14. Regarding claim 15, Voges discloses wherein said pressure block assembly comprises at least one piston which applies gripping force through said upper gripper plates onto said lower gripping plates (fig.3: the piston rods of the hydraulic cylinders (64) and (66)). Therefore, the modification of Voges in view of Sato the limitations of claim 15. Regarding claim 16, Voges discloses wherein said pressure block assembly further comprises hydraulic piping for providing hydraulic fluid to said at least one piston (col.9 lines 3-5). Therefore, the modification of Voges in view of Sato the limitations of claim 16. Claims 1-7, 9-16 and 18-19 are rejected under 35 U.S.C. 103 as being unpatentable over Holloway (US5181411A) in view of Sato (US20200360975A1). Regarding claims 1 and 9-10, Holloway discloses a stretcher (abstract and cols.3-5) with a pressure block assembly (fig.1 (12) and (13)); comprising: a head housing (fig.1: the housing between elements (12) and (13)); a pressure block assembly (fig.1: (12) and (13)) which is located in said housing and positioned within said housing via hydraulic cylinders; said hydraulic cylinders (col.3: lines 6-9: means of hydraulic pistons) raise said pressure block assembly; and said hydraulic cylinders lower said pressure block assembly to move said pressure block assembly out of said housing. Regarding claims 1 and 9-10, Holloway does not disclose a removal fixture comprising rollers which is rolled into position via a convevor extending into the housing under said pressure block assembly to receive the pressure block assembly which is lowered onto the removal fixture for removal of the pressure block assembly from the housing; wherein said hydraulic cylinders lower said pressure block assembly onto said removal fixture; and a mechanism to pull said pressure block assembly out of said head housing. Sato teaches a removal fixture (figs.3-5: (30)) comprising rollers (see the rollers of the element (30)) which is rolled into position via a convevor (figs.3-5: (31)) extending into a housing (figs.3-5: the housing of the element (A)) for removal of a processing block assembly from the housing (paragraphs 0051-0052); and a mechanism to pull said processing block assembly out of said head housing (paragraph 92). Therefore, it would have been obvious to one having ordinary skill in the art before the effective filing date of the claimed invention to modify the apparatus of Holloway by the configuration of a removal fixture comprising rollers which is rolled into position via a convevor extending into a housing as taught by Sato in order to allow prompt machine changing (Sato: paragraph 0024), thereby having a removal fixture comprising rollers which is rolled into position via a convevor extending into the housing under said pressure block assembly to receive the pressure block assembly which is lowered onto the removal fixture for removal of the pressure block assembly from the housing; and wherein said hydraulic cylinders lower said pressure block assembly onto said removal fixture; and a mechanism to pull said processing block assembly out of said head housing. Regarding claim 2, Holloway discloses a window formed in a wall of said housing (fig.1: the window of the housing between elements (12) and (13)) for accessing gripper plates (fig.1: (14) and (16)) within said housing for removal of said gripper plates (Holloway does not explicitly disclose removal; however, it would have been obvious to one of ordinary skill in the art at the time of the invention was made to Holloway in view of Sato to make the gripper plates to be removable for the purpose of the maintenance and repairing, since it has been held that if it were considered desirable for any reason to obtain access to the breaker members of Blackwell’s. In re Dulberg, 289 F.2d 522, 523, 129 USPQ 348, 349 (CCPA 1961). Regarding claim 3, Holloway discloses wherein said gripper plates comprises upper gripper plates and lower gripper plates (fig.1: (14) and (16)). Therefore, the modification of Holloway in view of Sato the limitations of claim 3. Regarding claim 4, Holloway discloses wherein said lower gripper plates remain fixed in said housing (fig.1: the lower elements (14) and (16) are capable to remain fix). Therefore, the modification of Holloway in view of Sato the limitations of claim 4. Regarding claim 5, Holloway discloses wherein said upper gripper plates (fig.1: (14) and (16)) move up and down relative to said housing. Therefore, the modification of Holloway in view of Sato the limitations of claim 5. Regarding claim 6, Holloway discloses wherein said pressure block assembly comprises at least one piston which applies gripping force through said upper gripping plate onto said lower gripping plates (col.3: lines 6-9: means of hydraulic pistons). Therefore, the modification of Holloway in view of Sato the limitations of claim 6. Regarding claim 7, Holloway discloses wherein said pressure block assembly further comprises hydraulic piping for providing hydraulic fluid to said at least one piston (col.3: lines 6-9: means of hydraulic pistons, and it is known in art that the hydraulic pistons having a pipe for supplying a hydraulic to the piston). Therefore, the modification of Holloway in view of Sato the limitations of claim 7. Regarding claim 10, Holloway discloses a mechanism to pull said pressure block assembly out of said head housing (obviously one having ordinary skill in art would use a removal fixture such as a crane which very know in art for lifting and moving heavy parts, the crane pull and push the pressure block assembly). Therefore, the modification of Holloway in view of Sato the limitations of claim 10. Regarding claims 11 and 18-19, Holloway discloses Holloway discloses a stretcher (abstract and cols.3-5) with; comprising: a head housing ((fig.1: the housing between elements (12) and (13)) having a window in a side wall ((fig.1: the window of the housing between elements (12) and (13)) to access gripper plates (fig.1: (14) and (16)); a pressure block assembly (fig.1: (12) and (13)) which is located in said housing and positioned by hydraulic cylinders (col.3: lines 6-9: means of hydraulic pistons) which raise the pressure block assembly and lower said pressure block assembly for removing said pressure block assembly from said head housing. Regarding claims 11 and 18-19, Holloway does not disclose a removable fixture having rollers which is rolled into position via a conveyor extending into the housing under said pressure block assembly to receive the pressure block assembly which is lowered onto the removal fixture for removal of the pressure block assembly from the housing; and herein said hydraulic cylinders are used to lower said pressure block assembly onto said removal fixture; and a mechanism to pull or push said pressure block assembly out of said head housing. Sato teaches a removal fixture (figs.3-5: (30)) having rollers (see the rollers of the element (30)) which is rolled into position via a convevor (figs.3-5: (31)) extending into a housing (figs.3-5: the housing of the elemnet (A)) for removal of a processing block assembly from the housing (paragraphs 0051-0052); and a mechanism to pull said processing block assembly out of said head housing (paragraph 92). Therefore, it would have been obvious to one having ordinary skill in the art before the effective filing date of the claimed invention to modify the apparatus of Holloway by the configuration of a removal fixture having rollers which is rolled into position via a convevor extending into a housing as taught by Sato in order to allow prompt machine changing (Sato: paragraph 0024), thereby having a removable fixture having rollers which is rolled into position via a conveyor extending into the housing under said pressure block assembly to receive the pressure block assembly which is lowered onto the removal fixture for removal of the pressure block assembly from the housing; and herein said hydraulic cylinders are used to lower said pressure block assembly onto said removal fixture. Regarding claim 12, Holloway discloses wherein said gripper plates comprises upper gripper plates and lower gripper plates (fig.1: (14) and (16)). Therefore, the modification of Holloway in view of Sato the limitations of claim 12. Regarding claim 13, Holloway discloses wherein said lower gripper plates remain fixed relative to said head housing (fig.1: the lower elements (14) and (16) are capable to remain fix). Therefore, the modification of Holloway in view of Sato the limitations of claim 13. Regarding claim 14, Holloway discloses wherein said upper gripper plates (fig.1: (14) and (16)) move up and down relative to said head housing. Therefore, the modification of Holloway in view of Sato the limitations of claim 14. Regarding claim 15, Holloway discloses wherein said pressure block assembly comprises at least one piston which applies gripping force through said upper gripper plates onto said lower gripping plates (fig.3: the piston rods of the hydraulic cylinders (64) and (66)). Therefore, the modification of Holloway in view of Sato the limitations of claim 15. Regarding claim 16, Holloway discloses wherein said pressure block assembly further comprises hydraulic piping for providing hydraulic fluid to said at least one piston (col.3: lines 6-9: means of hydraulic pistons). Therefore, the modification of Holloway in view of Sato the limitations of claim 16. 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 MOHAMMED S ALAWADI whose telephone number is (571)272-2224. The examiner can normally be reached 08:00 am- 05:00 pm. 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, CHRISTOPHER TEMPLETON can be reached at (571)270-1477. 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. /MOHAMMED S. ALAWADI/Primary Examiner, Art Unit 3725
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Prosecution Timeline

Sep 19, 2023
Application Filed
Oct 19, 2025
Non-Final Rejection — §103
Jan 22, 2026
Response Filed
Mar 03, 2026
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

3-4
Expected OA Rounds
74%
Grant Probability
99%
With Interview (+25.0%)
2y 8m
Median Time to Grant
Moderate
PTA Risk
Based on 692 resolved cases by this examiner. Grant probability derived from career allow rate.

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