Prosecution Insights
Last updated: April 19, 2026
Application No. 17/513,523

MONOLITHIC ULTRASONIC FLOW METER AND PARTICLE DETECTION SYSTEM

Final Rejection §102§103
Filed
Oct 28, 2021
Examiner
ZHONG, XIN Y
Art Unit
2855
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
Texas Instruments Incorporated
OA Round
5 (Final)
76%
Grant Probability
Favorable
6-7
OA Rounds
2y 11m
To Grant
91%
With Interview

Examiner Intelligence

Grants 76% — above average
76%
Career Allow Rate
465 granted / 611 resolved
+8.1% vs TC avg
Strong +15% interview lift
Without
With
+15.2%
Interview Lift
resolved cases with interview
Typical timeline
2y 11m
Avg Prosecution
33 currently pending
Career history
644
Total Applications
across all art units

Statute-Specific Performance

§101
0.7%
-39.3% vs TC avg
§103
51.8%
+11.8% vs TC avg
§102
21.0%
-19.0% vs TC avg
§112
23.6%
-16.4% vs TC avg
Black line = Tech Center average estimate • Based on career data from 611 resolved cases

Office Action

§102 §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 . Response to Arguments Applicant's arguments filed on 9/25/2025 have been fully considered but they are not persuasive. Regarding Applicant’s argument that Haque does not teach “an interconnect region on the substrate, the interconnect region including a plurality of dielectric layers and a plurality of metal interconnect lines”. Examiner respectfully disagrees. Haque teaches an interconnect region (Fig.5, center of the substrate 540) on the substrate (Fig.5, 540), the interconnect region including a plurality of dielectric layers and a plurality of metal interconnect lines (Paragraphs 121-122, “The first electrode (1982) may be electrically connected to the conductor (1984-1) using a metal, a via and interlayer dielectrics”). Claim Rejections - 35 USC § 102 The following is a quotation of the appropriate paragraphs of 35 U.S.C. 102 that form the basis for the rejections under this section made in this Office action: A person shall be entitled to a patent unless – (a)(1) the claimed invention was patented, described in a printed publication, or in public use, on sale, or otherwise available to the public before the effective filing date of the claimed invention. Claims 1-4, 8-9, 15, 21, 23-24, 27 and 29 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Haque et al. (U.S. Publication No. 20210124044). Regarding claim 1, Haque teaches an apparatus, comprising: a substrate (Fig.5, 540) including a semiconductor material; an interconnect region (Fig.5, center of the substrate 540) on the substrate, the interconnect region including a plurality of dielectric layers and a plurality of metal interconnect lines (Paragraphs 121-122, “The first electrode (1982) may be electrically connected to the conductor (1984-1) using a metal, a via and interlayer dielectrics”); resonators (Fig.5, first row of piezoelectric elements 104, furthermore paragraph 106 states “the piezoelectric elements 104 have a suspended membrane associated with them that vibrates at a center frequency and several other frequencies when exposed to stimulus at that frequency and as such behave like resonators”) within the interconnect region (Fig.5, center of the substrate 540); a transmitter circuit (Figs.1 and 5, 106 and paragraph 33) in the substrate and coupled to at least a first subset of the resonators (Fig.5, first row of piezoelectric elements 104, furthermore paragraph 106 states “the piezoelectric elements 104 have a suspended membrane associated with them that vibrates at a center frequency and several other frequencies when exposed to stimulus at that frequency and as such behave like resonators”), the transmitter circuit configurable to transmit a first signal using the first subset of the resonators (Paragraphs 52-53); and a detector circuit (Figs.1 and 5, 108 and paragraph 33) in the substrate and coupled to at least a second subset of the resonators (Fig.5, second row of piezoelectric elements 104), the detector circuit configurable to detect a second signal using the second subset of the resonators (Paragraphs 52-53). Regarding claim 2, Haque teaches wherein the first signal is transmitter circuit is a first ultrasonic signal, and the second signal is a second ultrasonic signal (Paragraphs 52-53). Regarding claim 3, Haque teaches a first multiplexer circuit and a second multiplexer circuit in the substrate, wherein the first multiplexer circuit is coupled between the transmitter circuit and the resonators, and the second multiplexer circuit is coupled between the detector circuit and the resonator (Paragraph 72). Regarding claim 4, Haque teaches wherein the transmitter circuit is a first transmitter circuit and the detector circuit is a first detector circuit and the apparatus further comprises: a second transmitter circuit in the substrate and coupled to at least a third subset of the resonators; and a second detector circuit in the substrate and coupled to at least a fourth subset of the resonators (Paragraphs 53-54, “the imaging device may have up to 128 transmit channels and up to 128 receive channels”). Regarding claim 8, Haque teaches wherein the resonators are configurable to transmit the first signal and receive the second signal via the interconnect region (Paragraphs 52-53). Regarding claim 9, Haque teaches wherein the resonators are configurable to transmit the first signal and receive the second signal via the substrate (Paragraphs 52-53). Regarding claim 15, Haque teaches a system, comprising: a device (Paragraphs 46-47), including: a substrate (Paragraph 33); an interconnect region (Fig.5, center of the substrate 540) on the substrate, the interconnect region including a plurality of dielectric layers and a plurality of metal interconnect lines (Paragraphs 121-122, “The first electrode (1982) may be electrically connected to the conductor (1984-1) using a metal, a via and interlayer dielectrics”); resonators (Fig.5, first row of piezoelectric elements 104, furthermore paragraph 106 states “the piezoelectric elements 104 have a suspended membrane associated with them that vibrates at a center frequency and several other frequencies when exposed to stimulus at that frequency and as such behave like resonators”) in the interconnect region (Fig.5, center of the substrate 540); a transmitter circuit (Figs.1 and 5, 106 and paragraph 33) in the substrate and coupled to at least a first subset of the resonators and configurable to transmit a first signal using the first subset of the resonators into a fluid flow channel (Fig.5, first row of piezoelectric elements 104, furthermore paragraph 106 states “the piezoelectric elements 104 have a suspended membrane associated with them that vibrates at a center frequency and several other frequencies when exposed to stimulus at that frequency and as such behave like resonators”); and a detector circuit (Figs.1 and 5, 108 and paragraph 33) in the substrate, and coupled to at least a second subset of the resonators (Fig.5, second row of piezoelectric elements 104) and configurable to detect a second signal using the second subset of the resonators, the second signal being a reflection of the first signal from the fluid flow channel (Paragraphs 46-47 and 52-53). Regarding claim 21, Haque teaches wherein resonators are ferroelectric resonators (Paragraph 33). Regarding claim 23, Haque teaches wherein the fluid flow channel is a blood vessel (Paragraph 47). Regarding claim 24, Haque teaches wherein the resonators are ferroelectric resonators (Fig.5, first row of piezoelectric elements 104, furthermore paragraph 106 states “the piezoelectric elements 104 have a suspended membrane associated with them that vibrates at a center frequency and several other frequencies when exposed to stimulus at that frequency and as such behave like resonators”). Regarding claim 27, Haque teaches wherein each of the resonators includes a first electrode, a second electrode, and a piezoelectric material between the first and second electrodes, and the interconnect region includes vias coupled between the second electrodes of the resonators and the substrate (Paragraph 109). Regarding claim 29, Haque teaches a processing circuit in the substrate coupled to the transmitter circuit and the detector circuit, the processing circuit configurable to provide a third signal indicative of a flow velocity responsive to the first and second signals (Paragraph 47). 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. Claims 10 and 30 are rejected under 35 U.S.C. 103 as being unpatentable over Haque et al. (U.S. Publication No. 20210124044) in view of Haque et al. (U.S. Publication No. 20210278530, hereinafter Haque530’). Regarding claim 10, Haque teaches an apparatus comprising: resonators (Fig.5, 104) in an interconnect region over a substrate (Fig.5, 540), the interconnect region including a plurality of dielectric layers and a plurality of metal interconnect lines (Paragraphs 121-122, “The first electrode (1982) may be electrically connected to the conductor (1984-1) using a metal, a via and interlayer dielectrics”); a transmitter circuit (Figs.1 and 5, 106 and paragraph 33) coupled to at least a first subset of the resonators and configurable to transmit a first signal at an angle relative to the substrate via the first subset of the resonators (Fig.5, first row of piezoelectric elements 104, furthermore paragraph 106 states “the piezoelectric elements 104 have a suspended membrane associated with them that vibrates at a center frequency and several other frequencies when exposed to stimulus at that frequency and as such behave like resonators”, also Fig.6 shows the angle); a detector circuit (Figs.1 and 5, 108 and paragraph 33) coupled to at least a second subset of the resonators and configurable to detect a second signal via the second subset of the resonators (Fig.5, second row of piezoelectric elements 104); and a processing circuit coupled to the transmitter circuit and the detector circuit and configurable to provide a third signal indicative of a flow velocity (Paragraph 47). Haque is silent about the flow velocity is based on the angle and at least one of: a frequency difference between the first and second signals, or a delay between transmission of the first signal and reception of the second signal. Haque530’ teaches the flow velocity is based on the angle and at least one of: a frequency difference between the first and second signals, or a delay between transmission of the first signal and reception of the second signal (Paragraphs 45 and 55-65). It would have been obvious to one of ordinary skill in the art before the effective filling date of the claimed invention to determine a frequency shift of the ultrasonic signal in Haque because it would be used to determine flow velocity and direction as taught by Haque530’. Regarding claim 30, Haque teaches wherein the transmitter circuit is configurable to transmit the first signal at an angle relatively to a surface of the substrate (Fig.6 shows the angle). Haque is silent about the processing circuit is configurable to provide the third signal based on the angle and on at least one of: a frequency difference between the first and second signals, or a delay between a transmission of the first signal and a reception of the second signal. Haque530’ teaches the processing circuit is configurable to provide the third signal based on the angle and on at least one of: a frequency difference between the first and second signals, or a delay between a transmission of the first signal and a reception of the second signal (Paragraphs 45 and 55-65). It would have been obvious to one of ordinary skill in the art before the effective filling date of the claimed invention to determine a frequency shift of the ultrasonic signal in Haque because it would be used to determine flow velocity and direction as taught by Haque530’. Claims 16, 22 and 28 are rejected under 35 U.S.C. 103 as being unpatentable over Haque et al. (U.S. Publication No. 20210124044). Regarding claim 16, Haque teaches all the features of claim 15 as outlined above, Haque is silent about wherein the device is permanently attached to the fluid flow channel. It would have been obvious to one of ordinary skill in the art before the effective filling date of the claimed invention to attach Haque’s device permanently to the fluid flow channel, since it has been held that forming in one piece an article which has formerly been formed in two pieces and put together involves only routine skill in the art. Howard v. Detroit Stove Works, 150 U.S. 164 (1893). Regarding claim 22, Haque teaches all the features of claim 15 as outlined above, Haque is silent about wherein the resonators, the transmitter circuit, and the detector circuit are part of a wearable device. It would have been obvious to one of ordinary skill in the art before the effective filling date of the claimed invention to make Haque’s resonators, transmitter circuit, and detector circuit into a part of a wearable device, since it has been held to be within the general skill of a worker in the art to apply a known technique to a known device (method, or product) ready for improvement to yield predictable results is obvious. KSR International Co. v Teleflex Inc., 550 U.S. 398, 82 USPQ2d 1385 (2007). Regarding claim 28, Haque teaches all the features of claim 1 as outlined above, Haque further teaches a package material encapsulating the substrate and the interconnect region (As shown in Fig.3, the transducer 102 is encapsulated by a housing). Haque is silent about wherein the package material includes at least one of: an epoxy, or filler particles. It would have been obvious to one of ordinary skill in the art before the effective filling date of the claimed invention to use epoxy or filler particles as the package material, since it has been held to be within the general skill of a worker in the art to select a known material on the basis of its suitability for the intended use as a matter of obvious design choice. In re Leshin, 227 F.2d 197, 125 USPQ 416 (CCPA 1960). Claims 17-18 are rejected under 35 U.S.C. 103 as being unpatentable over Haque et al. (U.S. Publication No. 20210124044) in view of Barkin et al. (U.S. Publication No. 20160025537). Regarding claim 17, Haque teaches all the features of claim 15 as outlined above, Haque is silent about the fluid flow channel has one fluid inlet and one fluid outlet; the device is located between the fluid inlet and the fluid outlet; and the transmitter circuit is configurable to transmit the first signal via the first subset of the resonators into the fluid flow channel in a direction toward the fluid inlet and to transmit a third signal via the first subset of the resonators into the fluid flow channel in a direction toward the fluid outlet. Barkin teaches the fluid flow channel (Fig.5, 50) has one fluid inlet and one fluid outlet (As shown in Fig.6); the device (Fig.5, 140) is located between the fluid inlet and the fluid outlet; and the transmitter circuit is configurable to transmit the first signal via the first subset of the resonators into the fluid flow channel in a direction toward the fluid inlet and to transmit a third signal via the first subset of the resonators into the fluid flow channel in a direction toward the fluid outlet (As shown in Fig.6, transducer 140 transmit ultrasonic signals in both directions). It would have been obvious to one of ordinary skill in the art before the effective filling date of the claimed invention to transmit Haque’s ultrasonic signals in both directions because it would more accurately determine flow rate. Regarding claim 18, Haque teaches all the features of claim 15 as outlined above, Haque is silent about the fluid flow channel has one fluid inlet, a first fluid outlet, and a second fluid outlet; the device is located between the fluid inlet and the first fluid outlet; and the transmitter circuit is configurable to transmit the first signal via the first subset of the resonators into the fluid flow channel in a direction toward the fluid inlet and to transmit a third signal via the first subset of the resonators into the fluid flow channel in a direction toward the second fluid outlet. It would have been obvious to one of ordinary skill in the art before the effective filling date of the claimed invention to make Haque’s fluid flow channel to have one fluid inlet, a first fluid outlet, and a second fluid outlet and place the device between the fluid inlet and the first fluid outlet; and the transmitter circuit is configurable to transmit the first signal via the first subset of the resonators into the fluid flow channel in a direction toward the fluid inlet and to transmit a third signal via the first subset of the resonators into the fluid flow channel in a direction toward the second fluid outlet, since it has been held that choosing from a finite number of identified, predictable solutions, with a reasonable expectation of success is obvious. KSR International Co. v Teleflex Inc., 550 U.S. 398, 82 USPQ2d 1385 (2007). Claim 25 is rejected under 35 U.S.C. 103 as being unpatentable over Haque et al. (U.S. Publication No. 20210124044) in view of Lal et al. (U.S. Publication No. 20210003534). Regarding claim 25, Haque teaches all the features of claim 15 as outlined above, Haque is silent about one or more reflectors. Lal teaches one or more reflectors (Paragraph 52). It would have been obvious to one of ordinary skill in the art before the effective filling date of the claimed invention to incorporate Lal’s reflector into Haque’s resonators because it would increase accuracy of Haque’s system. Allowable Subject Matter Claims 5-7, 13-14 and 26 are objected to as being dependent upon a rejected base claim, but would be allowable if rewritten in independent form including all of the limitations of the base claim and any intervening claims. The following is an examiner’s statement of reasons for allowance: The primary reasons for allowance of dependent claim 5 is the inclusion of the specific limitations of “a first grating between the first and third subsets of the resonators in the interconnect region, and a second grating between the second and fourth subsets of the resonators in the interconnect region”, in combination of with all other recited associated elements in a transducer The primary reasons for allowance of dependent claim 13 is the inclusion of the specific limitations of “a first grating between the first and third subsets of the resonators; and a second grating between the second and fourth subsets of the resonators”, in combination of with all other recited associated elements in an ultrasonic fluid flow measurement system. The primary reasons for allowance of dependent claim 26 is the inclusion of the specific limitations of “a third subset of the resonators form the one or more reflectors.”, in combination of with all other recited associated elements in an ultrasonic fluid flow measurement system. Any comments considered necessary by applicant must be submitted no later than the payment of the issue fee and, to avoid processing delays, should preferably accompany the issue fee. Such submissions should be clearly labeled “Comments on Statement of Reasons for Allowance.” Conclusion THIS ACTION IS MADE FINAL. 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 XIN Y ZHONG whose telephone number is (571)272-3798. The examiner can normally be reached M-F 9 a.m. - 6 p.m.. 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, Kristina Deherrera can be reached at 303-297-4237. 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. /XIN Y ZHONG/Primary Examiner, Art Unit 2855
Read full office action

Prosecution Timeline

Oct 28, 2021
Application Filed
Aug 28, 2023
Response after Non-Final Action
Aug 28, 2023
Examiner Interview (Telephonic)
Nov 20, 2023
Request for Continued Examination
Nov 22, 2023
Response after Non-Final Action
Dec 13, 2023
Non-Final Rejection — §102, §103
Mar 18, 2024
Response Filed
Jun 27, 2024
Non-Final Rejection — §102, §103
Oct 02, 2024
Response Filed
Oct 08, 2024
Final Rejection — §102, §103
Feb 07, 2025
Request for Continued Examination
Feb 11, 2025
Response after Non-Final Action
Jun 04, 2025
Request for Continued Examination
Jun 05, 2025
Response after Non-Final Action
Jun 21, 2025
Non-Final Rejection — §102, §103
Sep 25, 2025
Response Filed
Dec 27, 2025
Final Rejection — §102, §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

6-7
Expected OA Rounds
76%
Grant Probability
91%
With Interview (+15.2%)
2y 11m
Median Time to Grant
High
PTA Risk
Based on 611 resolved cases by this examiner. Grant probability derived from career allow rate.

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