Prosecution Insights
Last updated: October 25, 2026
Application No. 16/920,737

System and Method for Modulating Tissue Retraction Force in a Surgical Robotic System

Non-Final OA §103
Filed
Jul 05, 2020
Examiner
CHRISTIANSON, SKYLAR LINDSEY
Art Unit
3792
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
Asensus Surgical US Inc.
OA Round
5 (Non-Final)
61%
Grant Probability
Moderate
5-6
OA Rounds
0m
Est. Remaining
86%
With Interview

Examiner Intelligence

Grants 61% of resolved cases
61%
Career Allowance Rate
98 granted / 161 resolved
-9.1% vs TC avg
Strong +25% interview lift
Without
With
+25.4%
Interview Lift
resolved cases with interview
Typical timeline
3y 0m
Avg Prosecution
40 currently pending
Career history
219
Total Applications
across all art units

Statute-Specific Performance

§101
8.4%
-31.6% vs TC avg
§103
46.9%
+6.9% vs TC avg
§102
16.0%
-24.0% vs TC avg
§112
23.4%
-16.6% vs TC avg
Black line = Tech Center average estimate • Based on career data from 161 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 . Continued Examination Under 37 CFR 1.114 1. A request for continued examination under 37 CFR 1.114, including the fee set forth in 37 CFR 1.17(e), was filed in this application after final rejection. Since this application is eligible for continued examination under 37 CFR 1.114, and the fee set forth in 37 CFR 1.17(e) has been timely paid, the finality of the previous Office action has been withdrawn pursuant to 37 CFR 1.114. Applicant's submission filed on 09/16/2026 has been entered. Response to Arguments 2. Applicant’s arguments, filed 09/16/2026, with respect to the rejection(s) of the claim(s) under U.S.C. 103 have been fully considered and are persuasive. Therefore, the rejection has been withdrawn. However, upon further consideration, a new ground(s) of rejection is made in view of Merril (US 20060161045 A1). 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. 3. Claim(s) 1-4 and 8 is/are rejected under 35 U.S.C. 103 as being obvious over Balicki (US 20160361125 A1) in view of Merril (US 20060161045 A1). In regards to claim 1, Balicki discloses a medical robotic system (Abstract) comprising: at least a first robotic arm configured to support a surgical instrument having an end effector (Abstract and Par. 0021 disclose a robotic arm that can hold a surgical instrument. Par. 0043 teaches the instrument has an end effector), a sensor positioned to determine a magnitude of force or torque applied to tissue of a patient using the instrument (Par. 0019 teaches the arm having a force sensor [114]); wherein the robotic system includes a mode of operation operable to dynamically adjust the end effector position within the patient using the first robotic arm to substantially maintain a target direction and magnitude of forces or torques applied by the end effector (Par. 0047 teaches a cooperative control algorithm that can guide the arm. Claim 7-9 teach that the control system can also control the forces applied. Claim 7-9 further teach that the force sensor compares the applied force to a pre-determined value in order to maintain that value and makes corrections if it exceeds this value, i.e. it maintains direction and force). Balicki does not disclose wherein the system is programmed to operate in an autonomous mode, wherein in the autonomous mode of operation, dynamic adjustment of the end effector position is based on sensor feedback and is limited to end effector positions within a pre-defined region within the body cavity and wherein in the autonomous mode of operation, the position of the end effector is held rather than adjusted in response to a decrease in the magnitude of the force or torque applied to tissue by the end effector by more than a pre-determined amount within a pre-determined period of time. However, in the same field of endeavor, Merril discloses a system for controlling the force and movement of medical instruments (Abstract) wherein the system includes a control system that can automatically, i.e. autonomously, maintain the contact of the surgical instrument as long as it is within a threshold of desired force/magnitude measurements (Par. 0031; while this teaches there being a threshold of maintenance, this would still allow for the force of the surgical instruments to be automatically maintained, so long as the force applied on the tissue is within a safe pre-determined range) in order to maintain or achieve a desired quality of contact, or contact force (Par. 0031). Therefore, it would have been obvious to one having ordinary skill in the art before the effective filing date of the claimed invention to have taken the teachings of Balicki and modified them by having the system operate in an autonomous mode to maintain a position of the surgical instrument, as taught and suggested by Marril, in order to maintain or achieve a desired quality of contact, or contact force (Par. 0031 of Merril). In regards to claims 2 and 3, the combined teachings of Balicki and Merril teach the system of claim 1, further including at least one input device operable to set the target direction and magnitude and wherein the input device includes a user control input operable to command robotic motion of the robotic arm to position the end effector in contact with tissue and to apply a force or torque to the tissue at a first magnitude and in a first direction, and to instruct the system to set the target direction and target magnitude at the actual magnitude and actual direction (Par. 0061 of Balicki teaches giving user input for the direction and the force/torque). In regards to claim 4, the combined teachings of Balicki and Merril teach the system of claim 2, wherein the first robotic arm includes a manual mode in which the end effector is manually moveable by the hand of a user to position the end effector in contact with tissue and to apply an actual force or torque to the tissue at an actual magnitude, and wherein the system includes a surgeon input operable to instruct the system to set the target magnitude at the actual magnitude (Par. 0043 of Balicki discloses a user can hold and control the end-effector manually). In regards to claim 8, the combined teachings of Balicki and Merril teach the system of claim 1, where the movement allowed by the robotic arm when operating in the mode of operation is bound by operational limits that are controlled by the surgeon (Par. 0034 of Balicki teaches limiting the arms applied forces and movement). 4. Claim(s) 5-7 and 9-11 is/are rejected under 35 U.S.C. 103 as being unpatentable over Balicki and Merril in view of Hourtash (US 20140276954 A1) In regards to claims 5 and 7, the combined teachings of Balicki and Merril teach the system of claim 1, where the system includes a user input and a mode of operation for controlling the robotic arm/end effector’s applied force or torque as well as its positions (Par. 0034 and 0061 of Balicki). However, Balicki nor Merril disclose where in the is a second robotic arm or wherein at least two or more arms are enabled with the mode of operation, each arm being used to retract tissue, either along a common axis of force or along different axes of force. On the other hand, in the same field of endeavor, Hourtash teaches a robotic assembly for moving an end effector (Abstract) wherein there are two or more robotic arms with their own controllers/inputs (Par. 0006) and wherein the arms are used to retract tissue (Par. 0043 teaches manipulating tissue with the instruments) in order to move additional surgical instruments, or the like. Therefore, it would have been obvious to one having ordinary skill in the art to have taken the teachings of Balicki and Merril and modified them by having the system comprise two arms that can perform tissue resection, as taught and suggested by Hourtash, in order to move additional surgical instruments, or the like In regards to claim 6, the combined teachings of Balicki, Merril, and Hourtash as applied to claim 5 discloses the system of claim 5, wherein in the mode of operation movement of the second effector mirrors movement of the first end effector relative to a defined plane (Par. 0021 of Hourtash teaches the processor/control can determine the movements of the arms). In regards to claim 9, Balicki discloses a surgical robotic system (Abstract), comprising: robotic arm configured for robotic positioning of surgical instruments, respectively, in a body cavity, (Abstract and Par. 0021 disclose a robotic arm that can hold a surgical instrument) the robotic system configured to measure or receive as input direction and value of forces and/or torques applied by an end effector of each surgical instrument in contact with tissue using input from at least one sensor on the corresponding arm (Par. 0019 teaches the arm having a force sensor [114]); at least one surgeon input device for receiving surgeon input, the robotic system configured to control the first robotic arm based on the surgeon input to apply a first force and/or torque to tissue using the first surgical instrument (Par. 0061 teaches giving user input for the direction and the force/torque); wherein the system is operable in a force modulation mode in which the robotic system controls the robotic arm to apply a force to the tissue using the surgical instruments, the system configured to determine the direction and magnitude of the second force and/or torque to be applied based on the direction and magnitude of the first force and/or torque (Par. 0047 teaches a cooperative control algorithm that can guide the arm. Claim 7-9 teach that the control system can also control the forces applied). Balicki does not disclose where in the is a second robotic arm. On the other hand, in the same field of endeavor, Hourtash teaches a robotic assembly for moving an end effector (Abstract) wherein there are two or more robotic arms with their own controllers/inputs (Par. 0006) in order to move additional surgical instruments, or the like. Therefore, it would have been obvious to one having ordinary skill in the art to have taken the teachings of Balicki and modified them by having the system comprise two arms that can perform tissue resection, as taught and suggested by Hourtash, in order to move additional surgical instruments, or the like. Balicki does not disclose wherein the system is programmed to operate in an autonomous mode, wherein in the autonomous mode of operation, dynamic adjustment of the end effector position is based on sensor feedback and is limited to end effector positions within a pre-defined region within the body cavity and wherein in the autonomous mode of operation, the position of the end effector is held rather than adjusted in response to a decrease in the magnitude of the force or torque applied to tissue by the end effector by more than a pre-determined amount within a pre-determined period of time. However, in the same field of endeavor, Merril discloses a system for controlling the force and movement of medical instruments (Abstract) wherein the system includes a control system that can automatically, i.e. autonomously, maintain the contact of the surgical instrument as long as it is within a threshold of desired force/magnitude measurements (Par. 0031; while this teaches there being a threshold of maintenance, this would still allow for the force of the surgical instruments to be automatically maintained, so long as the force applied on the tissue is within a safe pre-determined range) in order to maintain or achieve a desired quality of contact, or contact force (Par. 0031). Therefore, it would have been obvious to one having ordinary skill in the art before the effective filing date of the claimed invention to have taken the teachings of Balicki and modified them by having the system operate in an autonomous mode to maintain a position of the surgical instrument, as taught and suggested by Marril, in order to maintain or achieve a desired quality of contact, or contact force (Par. 0031 of Merril). In regards to claim 10, the combined teachings of Balicki, Merril, and Hourtash as applied to claim 9 discloses the system of claim 9, further including a third robotic arm configured for robotic positioning of a third surgical instrument based on surgeon input using the at least one surgeon input device (Par. 0006 of Hourtash teaches there can be multiple robotic arms). In regards to claim 11, the combined teachings of Balicki, Merril, and Hourtash as applied to claim 9 discloses the system of claim 10, wherein system includes first and second surgeon input devices, the robotic system configured to control the first robotic arm based on surgeon input using the first surgeon input device, and to control the third robotic arm based on surgeon input using the second surgeon input device (Par. 0006 of Hourtash teaches two or more robotic arms with their own controllers/inputs). 5. Claim(s) 12 is/are rejected under 35 U.S.C. 103 as being unpatentable over Balicki, Merril, and Hourtash and in further view of Wang (US 20210121258 A1) In regards to claim 12, the combined teachings of Balicki, Merril, and Hourtash as applied to claim 9 discloses the system of claim 11 except for wherein the first and second surgical instruments are traction instruments and the third surgical instrument is an instrument for cutting, separating, or dissecting tissue. However, in the same field of endeavor, Wang teaches a surgical robotic system (Abstract) wherein there are several robotic arms (Par. 0005) that hold various surgical instruments for traction and cutting (Par. 0004 and 0060) in order to perform particular surgical procedures. Therefore, it would have been obvious to one having ordinary skill in the art to have taken the teachings of Balicki, Merril, and Hourtash and modified them by having the system comprise surgical instruments for traction and cutting, as taught and suggested by Wang, in order to perform particular surgical procedures. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to SKYLAR LINDSEY CHRISTIANSON whose telephone number is (571)272-0533. The examiner can normally be reached Monday-Friday, 7:30-5:30 EST. 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, Niketa Patel can be reached on (571) 272-4156. 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. /S.L.C./Examiner, Art Unit 3792 /LYNSEY C Eiseman/Primary Examiner, Art Unit 3796
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Prosecution Timeline

Show 6 earlier events
Sep 29, 2025
Request for Continued Examination
Oct 01, 2025
Response after Non-Final Action
Oct 27, 2025
Non-Final Rejection mailed — §103
Mar 27, 2026
Response Filed
Jun 16, 2026
Final Rejection mailed — §103
Sep 16, 2026
Request for Continued Examination
Sep 21, 2026
Response after Non-Final Action
Oct 02, 2026
Non-Final Rejection mailed — §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

5-6
Expected OA Rounds
61%
Grant Probability
86%
With Interview (+25.4%)
3y 0m (~0m remaining)
Median Time to Grant
High
PTA Risk
Based on 161 resolved cases by this examiner. Grant probability derived from career allowance rate.

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