Prosecution Insights
Last updated: August 15, 2026
Application No. 18/298,043

ENRICHMENT OF MUTATED CELL FREE NUCLEIC ACIDS FOR CANCER DETECTION

Non-Final OA §102
Filed
Apr 10, 2023
Priority
Jun 13, 2016 — provisional 62/349,514 +3 more
Examiner
ZHANG, KAIJIANG
Art Unit
Tech Center
Assignee
Grail LLC
OA Round
1 (Non-Final)
77%
Grant Probability
Favorable
1-2
OA Rounds
0m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 77% — above average
77%
Career Allowance Rate
537 granted / 698 resolved
+16.9% vs TC avg
Strong +35% interview lift
Without
With
+34.6%
Interview Lift
resolved cases with interview
Typical timeline
2y 8m
Avg Prosecution
18 currently pending
Career history
720
Total Applications
across all art units

Statute-Specific Performance

§101
8.0%
-32.0% vs TC avg
§103
29.2%
-10.8% vs TC avg
§102
21.0%
-19.0% vs TC avg
§112
27.3%
-12.7% vs TC avg
Black line = Tech Center average estimate • Based on career data from 698 resolved cases

Office Action

§102
DETAILED ACTION Notice of Pre-AIA or AIA Status 1. 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 2. Claim 53 is objected to because of the following informalities: “KRAS-G13D, KRAS-G13C, KRAS-G13R, KRAS-G13D, KRAS-G13C, KRAS-G13R, KRAS-G13S, KRAS-G12V, KRAS-G12A, KRAS-G12D, KRAS-G12D, KRAS-G12C” in lines 6-8 should be changed to “KRAS-G13D, KRAS-G13C, KRAS-G13R, . Appropriate correction is required. Claim Rejections - 35 USC § 102 3. 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 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. 4. 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. 5. Claims 41-54 are rejected under 35 U.S.C. 102(a)(1) and 102(a)(2) as being anticipated by Cann et al. (US 2016/0017396 A1). Regarding claim 41 Cann et al. teach, throughout the whole document, a method for analyzing the genome of a cancer patient, comprising: providing an endonuclease system that comprises a plurality of crRNAs, or derivatives thereof, and a plurality of Cas proteins, or variants thereof, wherein each crRNA comprises a targeting sequence, and wherein each Cas protein is capable of binding to a PAM site on a target nucleic acid (see paragraphs [0028]-[0029], [0136] and 0148]); contacting a patient sample, obtained from the cancer patient and comprising a plurality of target nucleic acids, with the endonuclease system to obtain a pool of target nucleic acid fragments associated with the patient sample, wherein each target nucleic acid fragment of the pool of target nucleic acid fragments is a DNA fragment of cell-free DNA (cfDNA) (see paragraphs [0054], [0156] and [0165]); sequencing the pool of target nucleic acid fragments to obtain first sequencing data from the cancer patient (see paragraphs [0054] and [0214]); and comparing the first sequencing data from the cancer patient with second sequencing data from a reference genome fragmented by the endonuclease system to detect structural rearrangements and mutations in the genome of the cancer patient (see paragraphs [0165]-[0166] and [0183]. When the method is used to “monitor tumor progression”, it involves comparing a first sequencing data from the cancer patient at a later time point with a second sequencing data from the cancer patient at an earlier time point, where the second sequencing data may be interpreted as sequencing data from a reference genome (i.e., the cancer patient’s genome at an earlier time point) fragmented by the same endonuclease system.). Regarding claim 42 The method according to Cann et al., wherein comparing the sequencing data comprises: comparing a first fragmentation pattern of the pool of target nucleic acids fragments associated with the patient sample with a second fragmentation pattern of a pool of target nucleic acids fragments from the reference genome (see paragraphs [0165]-[0166] and [0183]. When the method is used to “monitor tumor progression”, comparing the sequencing data comprises: comparing a first fragmentation pattern of the pool of target nucleic acids fragments associated with the patient sample [at a later time point] with a second fragmentation pattern of a pool of target nucleic acids fragments from the reference genome (i.e., the cancer patient’s genome at an earlier time point).). Regarding claim 43 The method according to Cann et al., further comprising: contacting a control sample, obtained from a control subject and comprising a plurality of target nucleic acids, with the endonuclease system to obtain the pool of target nucleic acid fragments from the reference genome and associated with the control sample; and sequencing the pool of target nucleic acid fragments associated with the control sample to obtain the second sequencing data from the reference genome (see paragraphs [0165]-[0166] and [0183]. When the method is used to “monitor tumor progression”, the control sample (which is obtained from the cancer patient at an earlier time point) is contacted with the same endonuclease system, and sequenced in the same way as the patient sample [at a later time point].). Regarding claims 44-45 The method according to Cann et al., wherein the endonuclease system cleaves target nucleic acids in the control sample at a predetermined interval, wherein the predetermined interval is about 300 bp (see paragraph [0194]). Regarding claims 46-47 The method according to Cann et al., wherein the plurality of Cas proteins comprises Cas9 or a variant thereof, wherein the Cas9 or variant thereof is derived from Streptococcus pyogenes (see paragraphs [0015], [0026], [0054] and [0149]). Regarding claim 48 The method according to Cann et al., wherein the patient sample comprises a blood sample, a serum sample, a plasma sample, a urine sample, or a cerebrospinal fluid sample (see paragraphs [0028] and [0156]). Regarding claim 49 The method according to Cann et al., wherein a sequence in the plurality of target nucleic acids in the patient sample comprises a mutant allele sequence (e.g., B-Raf V600E) selected from a group consisting of: AKT1, BRAF, EGFR, KRAS, MAP2K1, NRAS, PI3KCA and PTEN (see paragraph [0167]). Regarding claim 50 The method according to Cann et al., wherein a sequence in the plurality of target nucleic acids in the patient sample comprises a point mutation of at least one base pair (see paragraphs [0165]-[0166]). Regarding claim 51 The method according to Cann et al., wherein the cfDNA comprises circulating tumor DNA (ctDNA) that includes a mutation selected from a group consisting of: a single nucleotide mutation, an insertion, and a deletion (see paragraphs [0165]-[0166]). Regarding claim 52 The method according to Cann et al., wherein a target nucleic acid fragment of the pool of target nucleic acid fragments has either a blunt end or a staggered end (see paragraph [0204]). Regarding claims 53-54 The method according to Cann et al., wherein a sequence in the plurality of target nucleic acids in the patient sample comprises BRAF-V600E (i.e., B-Raf V600E) (see paragraph [0167]). Conclusion 6. No claim is allowed. Any inquiry concerning this communication or earlier communications from the examiner should be directed to KAIJIANG ZHANG whose telephone number is (571)272-5207. The examiner can normally be reached Monday - Friday, 8:30 am - 5 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, Heather Calamita can be reached on 571-272-2876. 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. /KAIJIANG ZHANG/Primary Examiner, Art Unit 1684
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Prosecution Timeline

Apr 10, 2023
Application Filed
Jul 22, 2026
Non-Final Rejection mailed — §102 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

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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
77%
Grant Probability
99%
With Interview (+34.6%)
2y 8m (~0m remaining)
Median Time to Grant
Low
PTA Risk
Based on 698 resolved cases by this examiner. Grant probability derived from career allowance rate.

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