Prosecution Insights
Last updated: August 17, 2026
Application No. 18/641,527

LIGHT DETECTION AND RANGING (LIDAR) SYSTEM CALIBRATION

Non-Final OA §102§103
Filed
Apr 22, 2024
Examiner
CHILTON, CLARA GRACE
Art Unit
Tech Center
Assignee
GM Global Technology Operations LLC
OA Round
1 (Non-Final)
54%
Grant Probability
Moderate
1-2
OA Rounds
1y 9m
Est. Remaining
66%
With Interview

Examiner Intelligence

Grants 54% of resolved cases
54%
Career Allowance Rate
39 granted / 72 resolved
-5.8% vs TC avg
Moderate +12% lift
Without
With
+12.2%
Interview Lift
resolved cases with interview
Typical timeline
4y 1m
Avg Prosecution
35 currently pending
Career history
101
Total Applications
across all art units

Statute-Specific Performance

§101
1.6%
-38.4% vs TC avg
§103
60.7%
+20.7% vs TC avg
§102
22.5%
-17.5% vs TC avg
§112
14.7%
-25.3% vs TC avg
Black line = Tech Center average estimate • Based on career data from 72 resolved cases

Office Action

§102 §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 . 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. (a)(2) the claimed invention was described in a patent issued under section 151, or in an application for patent published or deemed published under section 122(b), in which the patent or application, as the case may be, names another inventor and was effectively filed before the effective filing date of the claimed invention. Claims 1, 2, 7, 9-12, 17, 19, and 20 are rejected under 35 U.S.C. 102(a)(1) and 102(a)(2) as being anticipated by Hu (US 20230266451 A1). Claim 1: Hu teaches a process for calibrating a light detection and ranging (LiDAR) system comprising: physically aligning a body on a calibration structure [0061] - using lane marking to find x axis), wherein a LiDAR system is mounted on the body and centering the body using the calibration structure [0061] - using lane marking to find x axis); generating a LiDAR point cloud using the LiDAR system ([0058]); detecting a first linear structure and a ground plane using the LiDAR point cloud and determining a first vector aligned with the first linear structure, identifying a first plane normal to the first vector ([0052], [0061] - using lane marking to find x axis [0062] - ground plane); identifying a second vector normal to the ground plane and in the first plane ([0064]), and identifying a second plane normal to the second vector ([0061]); identifying a third vector at an intersection of the first plane and the second plane; identifying a third plane normal to the third vector ([0061], [0064]); and calibrating an orientation of the LiDAR system relative to the body using the first plane, the second plane, the third plane, the first vector, the second vector, and the third vector ([0036]). Claim 2: Hu teaches the process of Claim 1, wherein the first linear structure is a line disposed on the ground plane and extends from a front edge of the calibration structure ([0061] – lane markings extend past vehicle). Claim 7: Hu teaches the process of claim 1, wherein the first linear structure is contrasted with a surrounding environment ([0058] - identifying lane markings via intensity). Claim 9: Hu teaches the process of claim 1, wherein the body is a vehicle body and wherein the process is performed using a vehicle controller within the vehicle body ([0037]). Claim 10: Hu teaches the process of claim 1, wherein centering the body using the calibration structure comprises physically moving the body using the calibration structure ([0055] - collected during driving). Claim 11: Claim 11 is a system claim corresponding to claim 1. Thus, see rejection above. Claim 12: Claim 12 is a system claim corresponding to claim 2. Thus, see rejection above. Claim 17: Claim 17 is a system claim corresponding to claim 7. Thus, see rejection above. Claim 19: Hu teaches the LiDAR calibration system of claim 11, wherein the body is a vehicle body ([0037]). Claim 20: Claim 20 is a vehicle claim corresponding to Claim 1. Thus, see rejection above. 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 3, 4, 13, and 14 are rejected under 35 U.S.C. 103 as being unpatentable over Hu in view of Okuyama (US 20220120910 A1). Claim 3: Hu teaches the process of Claim 1. Hu does not teach, but Okuyama does teach wherein the first linear structure is a first line disposed in the ground plane within a range of the LiDAR system and wherein the line is approximately parallel to a front edge of the calibration structure (Fig. 4 and [0122], using wheel stopper as reference). It would have been prima facie obvious to someone having ordinary skill in the art before the effective filing date of the claimed invention to use the configuration, as taught by Okuyama, in the process as taught by Hu, because this is simply a rearrangement of parts (See MPEP 2144.04). Moving the reference structure would yield predictable results as it would simply change the orientation of the first vector, and the rest of the process would be able to go on as claimed. Claim 4: Hu, as modified, teaches the process of Claim 3. Hu, as modified, does not teach, but Okuyama does teach, wherein the first linear structure further comprises a second line disposed in the ground plane and extending perpendicular from the first line to a front edge of the calibration structure, and wherein the first vector is aligned with the second line (Fig. 4 and [0122], using parking line62 (perpendicular to wheel stopper 63) as reference). It would have been prima facie obvious to someone having ordinary skill in the art before the effective filing date of the claimed invention to use the configuration, as taught by Okuyama, in the process as taught by Hu, because this is simply a rearrangement of parts (See MPEP 2144.04). Moving the reference structure would yield predictable results as it would simply change the orientation of the first vector, and the rest of the process would be able to go on as claimed. Claims 13 and 14: Claims 13 and 14 are system claims corresponding to claims 3 and 4. Thus, see rejections above. Claims 5 and 15 are rejected under 35 U.S.C. 103 as being unpatentable over Hu in view of Weissman (US 20190080612 A1). Claim 5: Hu teaches the process of Claim , […] and wherein the first vector is normal to the planar surface, the second vector is normal to the ground plane, and the third vector is a cross product of the first vector and the second vector ([0061], [0064] – orientation of vectors). Hu does not teach, but Kim does teach, wherein the first linear structure is a planar surface normal to the ground plane ([0046] – reflective plates on a pole – Fig. 18A – would be normal to ground plane). It would have been prima facie obvious to someone having ordinary skill in the art before the effective filing date of the claimed invention to use the configuration as taught by Weissman in the process as taught by Hu, because this is simply a rearrangement of parts (See MPEP 2144.04). Moving the reference structure would yield predictable results as it would simply change the orientation of the first vector, and the rest of the process would be able to go on as claimed. Claim 15: Claim 15 is a system claim corresponding to claim 15. Thus, see rejection above. Claims 6 and 16 are rejected under 35 U.S.C. 103 as being unpatentable over Hu in view of Abari (US 11415683 B2). Claim 6: Hu teaches the process of Claim 1. Hu does not teach, but Abari does teach, wherein the first linear structure is a linear bar suspended above, and parallel to, the ground plane (Fig. 3B, calibration target 102). It would have been prima facie obvious to someone having ordinary skill in the art before the effective filing date of the claimed invention to use the configuration as taught by Abari in the process as taught by Hu, because this is simply a rearrangement of parts (See MPEP 2144.04). Moving the reference structure would yield predictable results as it would simply change the orientation of the first vector, and the rest of the process would be able to go on as claimed. Claim 16: Claim 16 is a system claim corresponding to claim 16. Thus, see rejection above. Claims 8 and 18 are rejected under 35 U.S.C. 103 as being unpatentable over Hu in view of Stroila (US 20100217529 A1). Claim 8: Hu teaches the process of claim 7. Hu does not teach, but Stroila does teach, wherein at least a portion of the first linear structure is one of a retroreflective paint and a retroreflective coating ([0037] – lane markings are retroreflective). It would have been prima facie obvious to someone having ordinary skill in the art before the effective filing date of the claimed invention to use the retroreflective lane markings, as taught by Stroila, in the process as taught by Hu, because lane markings being retroreflective is well known (as evidenced by most lane markings being on real roads being retroreflective). Claim 18: Claim 18 is a system claim corresponding to claim 8. Thus, see rejection above. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to CLARA CHILTON whose telephone number is (703)756-1080. The examiner can normally be reached Monday-Friday 6-2 MT. 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, Helal Algahaim can be reached at 571-270-5227. 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. /CLARA G CHILTON/ Examiner, Art Unit 3645 /HELAL A ALGAHAIM/ SPE , Art Unit 3645
Read full office action

Prosecution Timeline

Apr 22, 2024
Application Filed
Jul 22, 2026
Non-Final Rejection mailed — §102, §103
Jul 23, 2026
Interview Requested
Aug 11, 2026
Applicant Interview (Telephonic)
Aug 11, 2026
Examiner Interview Summary

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12704630
METHOD OF ROAD DETECTION FOR AN AUTOMOTIVE VEHICLE FITTED WITH A LIDAR SENSOR
5y 5m to grant Granted Aug 11, 2026
Patent 12693386
Lidar System Capable of Realizing 360° Rotary Scanning
4y 1m to grant Granted Jul 28, 2026
Patent 12669610
SYSTEMS, DEVICES AND METHODS FOR MICRO-VIBRATION DATA EXTRACTION USING A TIME OF FLIGHT (ToF) IMAGING DEVICE
5y 0m to grant Granted Jun 30, 2026
Patent 12613340
Device for Scanning Frequency-Modulated Continuous Wave (FMCW) LiDAR Range Measurement
3y 9m to grant Granted Apr 28, 2026
Patent 12609504
DUAL SPECTRAL VARIABLE-BASED OPTICAL FREQUENCY SCANNING LASER LIGHT SOURCE AND MEASUREMENT DEVICE USING THE SAME AND OBJECT ANGLE-DEPENDENT DISTANCE MEASUREMENT DEVICE USING PROPAGATION ANGLE SWITCHING FOR EACH OPTICAL FREQUENCY
3y 12m to grant Granted Apr 21, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

Strategy Recommendation AI-generated — please review before filing

Get a prosecution strategy drawn from examiner precedents, rejection analysis, and claim mapping.
Typically takes 5-10 seconds — AI-generated, attorney review required before filing

Prosecution Projections

1-2
Expected OA Rounds
54%
Grant Probability
66%
With Interview (+12.2%)
4y 1m (~1y 9m remaining)
Median Time to Grant
Low
PTA Risk
Based on 72 resolved cases by this examiner. Grant probability derived from career allowance rate.

Sign in with your work email

Enter your email to receive a magic link. No password needed.

Personal email addresses (Gmail, Yahoo, etc.) are not accepted.

Free tier: 3 strategy analyses per month