Prosecution Insights
Last updated: August 17, 2026
Application No. 16/848,989

NONINVASIVE DIAGNOSTICS BY SEQUENCING 5-HYDROXYMETHYLATED CELL-FREE DNA

Final Rejection §103
Filed
Apr 15, 2020
Priority
Apr 07, 2016 — provisional 62/319,702 +4 more
Examiner
SALMON, KATHERINE D
Art Unit
1682
Tech Center
1600 — Biotechnology & Organic Chemistry
Assignee
The Board of Trustees of the Leland Stanford Junior University
OA Round
8 (Final)
43%
Grant Probability
Moderate
9-10
OA Rounds
0m
Est. Remaining
81%
With Interview

Examiner Intelligence

Grants 43% of resolved cases
43%
Career Allowance Rate
337 granted / 792 resolved
-17.4% vs TC avg
Strong +38% interview lift
Without
With
+38.0%
Interview Lift
resolved cases with interview
Typical timeline
4y 0m
Avg Prosecution
65 currently pending
Career history
900
Total Applications
across all art units

Statute-Specific Performance

§101
19.4%
-20.6% vs TC avg
§103
28.2%
-11.8% vs TC avg
§102
11.3%
-28.7% vs TC avg
§112
35.1%
-4.9% vs TC avg
Black line = Tech Center average estimate • Based on career data from 792 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 . This action is in response to papers filed 4/20/2026. Applicant’s election of the species of ZFP36L1, DCXR and Chr4:90790001-90792000 in the reply filed on 6/08/2022 is acknowledged. Because applicant did not distinctly and specifically point out the supposed errors in the restriction requirement, the election has been treated as an election without traverse (MPEP § 818.01(a)). 4. Claims 2, 5-6, 10, 12-13 are pending. Claim 1, 3-4, 7-9 and 11 has been cancelled. Claims 5-6 has been withdrawn as being drawn to nonelected species. 5. The following rejections for claims 2, 10, 12-13 are newly applied necessitated by amendment. 6. This action is FINAL. Withdrawn Rejections The 35 USC 112a rejection made in the previous office action is withdrawn based upon amendments to the claims. The 35 USC 112b rejection made in the previous office action is withdrawn based upon the amendments that cancel the “optional” step. Claim Interpretation The claims have been amended to delete the requirement that FPKM value is greater than or equal to 10, and as such the claims have been broaden in the interpretation for obviousness. Further, it is noted that “consisting essentially of” is being interpreted as “comprising”. This interpretation is based upon the response to arguments stating that the language may be construed equivalently to comprising for examination purposes (see page 7 of reply). Claim Rejections - 35 USC § 103 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 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. This application currently names joint inventors. In considering patentability of the claims the examiner presumes that the subject matter of the various claims was commonly owned as of the effective filing date of the claimed invention(s) absent any evidence to the contrary. Applicant is advised of the obligation under 37 CFR 1.56 to point out the inventor and effective filing dates of each claim that was not commonly owned as of the effective filing date of the later invention in order for the examiner to consider the applicability of 35 U.S.C. 102(b)(2)(C) for any potential 35 U.S.C. 102(a)(2) prior art against the later invention. Claim(s) 2, 10, 12-13 is/are rejected under 35 U.S.C. 103 as being unpatentable over Erbenstein et al. (WO 2014/191981 December 4, 2014) in view of Dor et al. (WO2015/159293 April 14, 2025) and Lee et al. (US Patent Application Publication 2015/0376612 Dec 31, 2015) With regard to claim 2, Erbenstein et al. teaches obtaining samples and incubating the DNA with β-glucosyltransferase and UDP and placing 5hmc on a solid support (p 3 , 6, and 24). Erbenstein et al. does not teach that the sample is from cfDNA. Erbenstein et al. teaches providing a reference hydroxy methylome reference (p. 44-45). Erbenstein et al. teaches dividing the full length of DNA to give a normalized value for 5hmC, however, does not teach FPKM (p 43-44 and 48). Erbenstein et al. teaches mapping to determine differences (p. 44). Erbenstein et al. teaches measurement of increased expression of hydroxy methylation (p. 30). Erbenstein et al. teaches that 5hmC levels vary greatly between different tissues and suggests detection of epigenetic modifications in tissue distribution (p 1, 6 and 47). With regard to claim 2, Dor et al teaches that cfDNA can be used in tissue of origin methodologies (p. 12-16). Dor et al. teaches that 5 hydroxymethylcytosine can be detected in cfDNA (p. 12-16). With regard to claims 10, 12, Dor et a. teaches that cfDNA profiles can be used to compare to particular tissue references (p 12-16). Dor et al teaches methylome comparisons and as such these steps can be combined with Erbenstein et al. to measure and compare 5hmC. With regard to claim 2, Lee et al. teaches methods of assembling transcript expression data (para 41-46 and 145 and 244). Lee et al. teaches that one method of calculating and assembling is by used FPKM (para 41-46). Therefore it would be prima facie obvious to one of ordinary skill at the time of the effective filing date to modify the method of Erbenstein et al. to use the method steps and sample type of Dor et al. and Lee et al in order to screen easily obtained cfDNA from fluid samples and use the comparison methodology for large number of expression products as taught by Lee et al. The ordinary artisan would have a reasonable expectation of success of combining known steps of determining 5mC differences. Conclusion No claims are allowed. 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 KATHERINE D SALMON whose telephone number is (571)272-3316. The examiner can normally be reached 9-530. 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, Wu Cheng (Winston) Shen can be reached on 5712723157. 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. /KATHERINE D SALMON/ Primary Examiner, Art Unit 1682
Read full office action

Prosecution Timeline

Show 11 earlier events
Aug 22, 2024
Non-Final Rejection mailed — §103
Feb 21, 2025
Response Filed
Apr 14, 2025
Final Rejection mailed — §103
Jun 27, 2025
Request for Continued Examination
Jul 02, 2025
Response after Non-Final Action
Feb 02, 2026
Non-Final Rejection mailed — §103
Apr 20, 2026
Response Filed
Jul 01, 2026
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

9-10
Expected OA Rounds
43%
Grant Probability
81%
With Interview (+38.0%)
4y 0m (~0m remaining)
Median Time to Grant
High
PTA Risk
Based on 792 resolved cases by this examiner. Grant probability derived from career allowance rate.

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