Prosecution Insights
Last updated: April 18, 2026
Application No. 18/338,343

BACKSCATTER BASED POSITIONING

Final Rejection §102
Filed
Jun 20, 2023
Examiner
DOAN, PHUOC HUU
Art Unit
2646
Tech Center
2600 — Communications
Assignee
Qualcomm Incorporated
OA Round
2 (Final)
92%
Grant Probability
Favorable
3-4
OA Rounds
2y 6m
To Grant
99%
With Interview

Examiner Intelligence

Grants 92% — above average
92%
Career Allow Rate
1022 granted / 1115 resolved
+29.7% vs TC avg
Moderate +9% lift
Without
With
+8.7%
Interview Lift
resolved cases with interview
Typical timeline
2y 6m
Avg Prosecution
22 currently pending
Career history
1137
Total Applications
across all art units

Statute-Specific Performance

§101
8.4%
-31.6% vs TC avg
§103
27.9%
-12.1% vs TC avg
§102
32.0%
-8.0% vs TC avg
§112
9.8%
-30.2% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1115 resolved cases

Office Action

§102
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 with respect to claim(s) 28-29 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 § 102 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 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 – Claim(s) 28-29 is/are rejected under 35 U.S.C. 102(a)(2) as being anticipated by SAILY et al. (US Pub No. 2024/0163840). Claim 28, SAILY discloses a method to support one or more positioning operations performed by a tag device (See Fig. 2), the method comprising: receiving a data signal on a first channel (par [0044] “disclosed in specifically of a positioning procedure to assist in obtaining measurements (such as channel estimate information), and other positioning control entity to determine a location or position of the one or more backscatter nodes to support each of the backscatter nodes”); the data signal modulated with data associated with a communication operation (par [0035] “ backscatter communication may allow a backscatter node to reflect a received ambient signal while modulating data onto the reflected signal. For example, the reflected backscatter signal may be modulated using active (or switched) load modulation “); and transmitting a backscatter signal on a second channel, distinct from the first channel, wherein the backscatter signal is generated based on the data signal (par [0044] “ distinct from the first channel by channel corresponding to an assigned backscatter to provide different channel and determine a location of at least some of the backscatter nodes, and channel estimate information from a plurality of second (measuring) UEs. Claim 29, SAILY further discloses the method of claim 28, further comprising: receiving an activation signal on the first channel, the activation signal interspersed on resource blocks (RBs) of the first channel together with data included in the data signal (par [0043] “applied by performed channel estimate information indicates an estimate of a channel between one of the plurality of second user devices and each of the at least some of the backscatter nodes, and wherein the channel estimate information received from each second user device is based on the transmitted positioning signal that is frequency shifted by an assigned backscatter frequency offset and reflected by each of the at least some of the backscatter nodes where to using control functions or blocks in associated with the backscatter nodes”); and transmitting the backscatter signal in response to receipt of the activation signal (par [0061]). Allowable Subject Matter Claims 1-27 are allowed. The following is an examiner’s statement of reasons for allowance: Claims 1, and their dependents thereof, are allowed because the closest prior art, either alone or in combination, fail to disclose the claim limitations of receiving, from a transmit network entity, a data signal via a first channel; receiving, from a tag device, a backscatter signal based on the data signal received by the tag device via the first channel, the backscatter signal received via a second channel that is different from the first channel; and transmitting a report that indicates a position measurement associated with a position of the tag device, the position measurement determined based on the received data signal and the received backscatter signal Claim 30 is 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. Claim 30, The method of claim 28, further comprising: receiving a deactivation signal on a third channel distinct from the first channel and the second channel; and ceasing transmission of the backscatter signal in response to receipt of the deactivation signal. Conclusion The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. Douglas et al. (US Patent No. 7,293,088) discloses tag location, client location, and coverage hole location in a wireless network. 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 PHUOC HUU DOAN whose telephone number is (571)272-7920. The examiner can normally be reached 8:00AM - 4:00PM. 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, LESTER KINCAID can be reached at 571-272-7922. 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. /PHUOC H DOAN/ Primary Examiner, Art Unit 2646
Read full office action

Prosecution Timeline

Jun 20, 2023
Application Filed
Oct 15, 2025
Non-Final Rejection — §102
Jan 12, 2026
Response Filed
Feb 15, 2026
Final Rejection — §102
Apr 13, 2026
Request for Continued Examination
Apr 15, 2026
Response after Non-Final Action

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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
92%
Grant Probability
99%
With Interview (+8.7%)
2y 6m
Median Time to Grant
Moderate
PTA Risk
Based on 1115 resolved cases by this examiner. Grant probability derived from career allow rate.

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