Prosecution Insights
Last updated: July 17, 2026
Application No. 18/277,777

HYDRODYNAMICS PARAMETER DETECTION EQUIPMENT FOR CATHETER

Non-Final OA §112
Filed
Aug 18, 2023
Priority
Sep 27, 2022 — CN 202211177575.1 +1 more
Examiner
ORTEGA, MARTIN NATHAN
Art Unit
3791
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
Shandong Branden Medical Device Co. Ltd.
OA Round
1 (Non-Final)
25%
Grant Probability
At Risk
1-2
OA Rounds
1y 0m
Est. Remaining
57%
With Interview

Examiner Intelligence

Grants only 25% of cases
25%
Career Allowance Rate
20 granted / 79 resolved
-44.7% vs TC avg
Strong +32% interview lift
Without
With
+31.8%
Interview Lift
resolved cases with interview
Typical timeline
3y 11m
Avg Prosecution
27 currently pending
Career history
116
Total Applications
across all art units

Statute-Specific Performance

§101
5.9%
-34.1% vs TC avg
§103
83.0%
+43.0% vs TC avg
§102
4.1%
-35.9% vs TC avg
§112
5.6%
-34.4% vs TC avg
Black line = Tech Center average estimate • Based on career data from 79 resolved cases

Office Action

§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 Objections Claims 1-2 and 8 are objected to because of the following informalities: Claim 1 recites “in real time in the infusion” in line 25 on page 4, but instead should be --in real time of the infusion.” Claim 1 should be amended to omit the last “that” in line 27 on page 4. Claim 1 should be amended to add “in” before the first “a” in line 28 on page 4. Claim 2 should be amended to add --in-- after the first “is” in line 4. Claim 8 recites “the signal wire” in line 4, but instead should be --the signal wires--. Appropriate correction is required. Claim Rejections - 35 USC § 112 Claim 1 is rejected under 35 U.S.C. 112(a) or 35 U.S.C. 112 (pre-AIA ), first paragraph, as failing to comply with the written description requirement. The claim(s) contains subject matter which was not described in the specification in such a way as to reasonably convey to one skilled in the relevant art that the inventor or a joint inventor, or for applications subject to pre-AIA 35 U.S.C. 112, the inventor(s), at the time the application was filed, had possession of the claimed invention. Claim 1 recites Fs=f(v) in the last line on page 4 and line 8 on page 5, but the specification does not provide details on what f(v) is or what “v” is. Further clarification required. Claim 1 recites F=f(t) in line 25 on page 5, but the specification does not provide details on what f(t) is or what “t” is. Further clarification required. 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 1-10 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 1 recites Fs=f(v) in the last line on page 4 and line 8 on page 5, but is indefinite. What is f(v)? Further clarification required. Claim 1 recites F=f(t) in line 25 on page 5, but is indefinite. What is f(t)? Further clarification required. Claim 4 recites “ where the stand is a ‘U’-shaped stand . . . and position control buttons comprising ‘▲,’ ‘▼,’ ‘║,’ ‘►’”, but is indefinite because it fails to point out what is included or excluded by the claim language. This claim is an omnibus type claim. The claim as written is unclear because the bounds of the shapes of the stand and buttons are unknown. For example, what is included or excluded from those shapes, e.g., acute triangles, obtuse triangles, and/or those that have the same general shape. Written details in the claim are required to determine the metes and bounds. Claims not listed are rejected by virtue of claim dependency. Examiner’s Note The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. The closest prior art is CN104950130 A (Cited by applicant). Comparatively, the two inventions are distinct in that ‘130 differs in the specific elements of the power system, lifting system, measurement system, computer processing, constant-temperature storage system, and chair. The prior art does teach or suggest teachings related to the catheter detection system of fluid velocity, the operating platform and regulation system/power system, mass sensor 7, a processing system, option buttons (¶[0006-9,0013] and figs. 1-3). Schwartz teaches mean distal pressure determinations may then be divided by the corresponding infusate flow rate to yield mean dynamic Microvascular Resistance (dMVR) values, wherein mean dMVR=(Pd)/(Qpump) at each flow rate. US 20210361170 Wolff teaches the frictional force component F.sub.0 may for example depend on the following parameters: the syringe brand, model and batch, the pushing velocity, the position of the piston on its full travel range, the temperature, the waiting time between syringe preparation and infusion start, the liquid inside the syringe, and the pressure. (The catheter size, the extension line diameter and length and the drug viscosity generally can be considered to have no influence on the frictional force. But these parameters may of course have an influence on the pressure.) US 20200289750 Uber teaches the controller and/or equalizing flow valve may be pre-programmed according to the impedance characteristics of the system including for example, the types of fluids used in the fluid injection system, the catheter size, the capacitance of the fluid injection system, and/or the desired flow rates of the two fluids, which information may be stored in the controller. US 20200121860 Schwartz teaches infusion pressure, flows, volumes or rates may be governed in real time or according to measured/sensed vessel parameters including flow, anatomy, pressure, resistance, intracoronary ECG, or similar physiologic measurements. US 20200093991 Voigt teaches it is desirable to understand the parameters (i.e., timing and infusion rate) associated with the administration of the fluid boluses. Existing methods to remove noise employ bandpass and low pass filters that successfully eliminate a large portion of the noise but that also degrade the temporal resolution of the data. For example, Savitzky-Golay filters minimize least-squares errors over fixed frames to fit a polynomial to a noisy signal. US 20160158442 Bacallao teaches a catheter and control box apparatus and related methods that are useful in delivering liquids, including liquids comprising nucleic acid molecules into cells. In particular, the invention provides a catheter that stabilizes fluid flow within a vein to deliver a volume, pressure charge of saline solution, exogenous compositions, and isolated vectors to kidney cells, using the renal vein as a guide and under hydrodynamic pressure. US 20160213896 Borody teaches a first set of motor or motors operably connected to rollers or equivalent for massaging, shaking or vibrating an individual lying on or sitting in the colonic washout machine or device. US 20220233437 Calderon teaches a water-flow model that cascades; the other is a moving crowd model. In the water-flow model, the size and shape of the catheters influence the motion of fluid through the catheters. Also, the motion of fluid in parallel and opposite directions, and orientation through the catheters and through the vascular beds obeys the physical laws related to pressure, flow rate, and volume. US 20060149393 Due to the standing rejections stated above, the claims are not in condition for allowance. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to MARTIN NATHAN ORTEGA whose telephone number is (571)270-7801. The examiner can normally be reached M-F 7:10 am - 5:00 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, Robert (Tse) Chen can be reached at (571) 272-3672. 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. /MARTIN NATHAN ORTEGA/Examiner, Art Unit 3791 /TSE W CHEN/Supervisory Patent Examiner, Art Unit 3791
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Prosecution Timeline

Aug 18, 2023
Application Filed
Apr 28, 2026
Non-Final Rejection mailed — §112
May 28, 2026
Interview Requested
Jun 03, 2026
Examiner Interview Summary
Jun 03, 2026
Applicant Interview (Telephonic)
Jun 30, 2026
Interview Requested

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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
25%
Grant Probability
57%
With Interview (+31.8%)
3y 11m (~1y 0m remaining)
Median Time to Grant
Low
PTA Risk
Based on 79 resolved cases by this examiner. Grant probability derived from career allowance rate.

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