Prosecution Insights
Last updated: May 29, 2026

Guardant Health Inc.

26 pending office actions • 9 art units • 21 examiners • 0 of 26 (0%) have an AI response strategy ready • 29 patents granted in the last 365 days

Portfolio Summary

26
Total Pending OAs
17
Non-Final OAs
8
Final Rejections
1
Advisory / Quayle

Response Deadline Pressure

Based on the USPTO statutory response window for each pending office action. 26 of the docket's apps have a known mailing date; the rest are excluded from the tile counts.

19
Overdue
0
Due this week
5
Due this month
1
Due in next 60 days
1
Due later

Deadline Fire Line

Every pending office action with a known statutory deadline, placed on a days-until-due axis. Dots left of Today are overdue; the further right, the more runway. Cases that share a deadline window stack vertically. 26 of the docket's apps have a known mailing date.

-30dToday30d60d90d120d
Overdue (19)Due ≤ 30 days (5)Due ≤ 60 days (1)Due later (1)

Case Difficulty Mix

Difficulty is derived from the rejection statutes on the most recent pending office action. §101-driven and multi-statute cases are graded Hard; §112-only and obviousness-type double-patenting cases are graded Easy; everything else is Medium. "Unknown" means we have not yet parsed a statute for that office action.

5
Hard (19%)
15
Medium (58%)
1
Easy (4%)
5
Unknown (19%)

Rejection Statute Mix

BucketCases
§101 only5 (19%)
§103 only15 (58%)
§112 only1 (4%)
No statute on record5 (19%)

Industry Mix

How the docket's pending cases split across USPTO tech-center bands.

23
Life Sciences
88% of docket
1
Information Tech
4% of docket
0
Communications
0% of docket
0
Semiconductors
0% of docket
2
Mechanical / Eng
8% of docket
0
Business / Other
0% of docket

Time-on-OA Estimate

Manual office-action response work runs about 10 hours per case. The time-saved bands below show what IP Author's prosecution pipeline typically delivers — a conservative 20% on the low end, 35% in the middle, 50% on the high end.

260 h
Manual time on pending OAs
52 h
Time saved (low, 20%)
91 h
Time saved (mid, 35%)
2.3 wks
FTE-weeks freed (mid)

Top Examiners on this docket

ExaminerApps on this docketAllow rateInterview lift
WOITACH, JOSEPH T 4 49.1% +27.5%
ZEMAN, MARY K 2 59.0% +34.5%
VASSELL, MEREDITH ABBOTT 2 28.8% +47.2%
HORLICK, KENNETH R 1 78.9% +15.2%
RUIZ, ANGELICA 1 83.0% +14.7%
LIU, GUOZHEN 1 49.0% +24.7%
GUSSOW, ANNE 1 58.2% +43.0%
SANGHERA, STEVEN G.S. 1 30.4% +29.4%
JONES, CHRISTINE MICHELLE 1
DAUNER, JOSEPH G 1 56.8% +34.8%

Quick Wins (1)

Cases in front of an examiner with an allow rate of 80%+ where the difficulty is Easy or Medium. The top 1 ordered by deadline are shown.

App #TitleExaminerDue in
19342223 DATA PROCESSING ABSTRACTION FOR HIGH PERFORMANCE COMPUTING SYSTEMS RUIZ, ANGELICA 1d overdue

Hard Cases (6)

Multi-statute / §101-driven matters, or cases in front of an examiner with an allow rate under 30%. The top 6 ordered by deadline are shown.

App #TitleExaminerDue in
17462906 DETECTION AND TREATMENT OF DISEASE EXHIBITING DISEASE CELL HETEROGENEITY AND SYSTEMS AND METHODS FOR COMMUNICATING TEST RESULTS WOITACH, JOSEPH T 126d overdue
16560752 METHODS AND SYSTEMS FOR DETECTING ALLELIC IMBALANCE IN CELL-FREE NUCLEIC ACID SAMPLES VASSELL, MEREDITH ABBOTT 79d overdue
17219338 DETERMINING TUMOR FRACTION FOR A SAMPLE BASED ON METHYL BINDING DOMAIN CALIBRATION DATA HAYES, JONATHAN EDWARD 60d overdue
15431395 DETECTION AND TREATMENT OF DISEASE EXHIBITING DISEASE CELL HETEROGENEITY AND SYSTEMS AND METHODS FOR COMMUNICATING TEST RESULTS WOITACH, JOSEPH T 30d overdue
17162897 SIGNIFICANCE MODELING OF CLONAL-LEVEL ABSENCE OF TARGET VARIANTS VASSELL, MEREDITH ABBOTT 26d overdue
17823915 DATA REPOSITORY, SYSTEM, AND METHOD FOR COHORT SELECTION REYES, REGINALD R 69d

Interview Candidates (14)

Cases in front of an examiner whose interview lift is 10 percentage points or more — i.e. interviewed cases historically resolve more favorably than non-interviewed ones. The top 8 ordered by deadline are shown.

App #TitleExaminerDue in
17462906 DETECTION AND TREATMENT OF DISEASE EXHIBITING DISEASE CELL HETEROGENEITY AND SYSTEMS AND METHODS FOR COMMUNICATING TEST RESULTS WOITACH, JOSEPH T 126d overdue
15796642 DIAGNOSTIC METHODS WOITACH, JOSEPH T 99d overdue
16560752 METHODS AND SYSTEMS FOR DETECTING ALLELIC IMBALANCE IN CELL-FREE NUCLEIC ACID SAMPLES VASSELL, MEREDITH ABBOTT 79d overdue
17407000 METHODS AND SYSTEMS FOR DETERMINING THE CELLULAR ORIGIN OF CELL-FREE DNA ZEMAN, MARY K 73d overdue
18907227 DETECTING THE PRESENCE OF A TUMOR BASED ON METHYLATION STATUS OF CELL-FREE NUCLEIC ACID MOLECULES SANGHERA, STEVEN G.S. 67d overdue
19018456 METHODS FOR EARLY DETECTION OF CANCER GUSSOW, ANNE 37d overdue
18470187 METHODS AND COMPOSITIONS FOR QUANTIFYING IMMUNE CELL DNA DAUNER, JOSEPH G 36d overdue
15431395 DETECTION AND TREATMENT OF DISEASE EXHIBITING DISEASE CELL HETEROGENEITY AND SYSTEMS AND METHODS FOR COMMUNICATING TEST RESULTS WOITACH, JOSEPH T 30d overdue

Top Art Units

Art UnitApps
1687 7
1682 5
1681 4
1686 3
3684 2
1685 2
2154 1
1683 1
1635 1

Pending Office Actions

App #TitleExaminerArt UnitStatutesStatusDue inAIFiled
19362169 SYSTEMS AND METHODS TO DETECT RARE MUTATIONS AND COPY NUMBER VARIATION HORLICK, KENNETH R 1681 Other Non-Final OA 11d overdue Pending Oct 17, 2025
19342223 DATA PROCESSING ABSTRACTION FOR HIGH PERFORMANCE COMPUTING SYSTEMS RUIZ, ANGELICA 2154 §103 Non-Final OA 1d overdue Pending Sep 26, 2025
19239357 METHODS FOR MULTI-RESOLUTION ANALYSIS OF CELL-FREE NUCLEIC ACIDS LIU, GUOZHEN 1686 §103 Non-Final OA 56d Pending Jun 16, 2025
19018456 METHODS FOR EARLY DETECTION OF CANCER GUSSOW, ANNE 1683 §103 Final Rejection 37d overdue Pending Jan 13, 2025
18907227 DETECTING THE PRESENCE OF A TUMOR BASED ON METHYLATION STATUS OF CELL-FREE NUCLEIC ACID MOLECULES SANGHERA, STEVEN G.S. 3684 §103 Non-Final OA 67d overdue Pending Oct 04, 2024
18506858 METHODS AND COMPOSITIONS FOR COPY-NUMBER INFORMED TISSUE-OF-ORIGIN ANALYSIS JONES, CHRISTINE MICHELLE 1682 Other Non-Final OA 31d overdue Pending Nov 10, 2023
18470187 METHODS AND COMPOSITIONS FOR QUANTIFYING IMMUNE CELL DNA DAUNER, JOSEPH G 1682 Other Non-Final OA 36d overdue Pending Sep 19, 2023
18365744 QUALITY CONTROL METHOD BERTAGNA, ANGELA MARIE 1681 §112 Non-Final OA 105d overdue Pending Aug 04, 2023
18339116 METHODS AND SYSTEMS FOR ANALYZING METHYLATED POLYNUCLEOTIDES WILDER, CYNTHIA B 1681 §103 Non-Final OA 60d overdue Pending Jun 21, 2023
18325759 COMPOSITIONS AND METHODS FOR ENRICHING METHYLATED POLYNUCLEOTIDES YU, TIAN NMN 1681 Other Non-Final OA 14d Pending May 30, 2023
18152042 METHODS OF DETECTING GENOMIC REARRANGEMENTS USING CELL FREE NUCLEIC ACIDS GRAY, JESSICA 1682 §103 Final Rejection 27d Pending Jan 09, 2023
17823915 DATA REPOSITORY, SYSTEM, AND METHOD FOR COHORT SELECTION REYES, REGINALD R 3684 §101 Non-Final OA 69d Pending Aug 31, 2022
17693744 Machine Learning for Somatic Single Nucleotide Variant Detection in Cell-free Tumor Nucleic acid Sequencing Applications ZEMAN, MARY K 1686 Other Final Rejection 28d overdue Pending Mar 14, 2022
17682759 DETERMINING CELL TYPE ORIGIN OF CIRCULATING CELL-FREE DNA WITH MOLECULAR COUNTING HANEY, AMANDA MARIE 1682 §103 Non-Final OA 125d overdue Pending Feb 28, 2022
17489677 METHODS AND SYSTEMS TO IMPROVE THE SIGNAL TO NOISE RATIO OF DNA METHYLATION PARTITIONING ASSAYS SALMON, KATHERINE D 1682 §103 Non-Final OA 8d Pending Sep 29, 2021
17462906 DETECTION AND TREATMENT OF DISEASE EXHIBITING DISEASE CELL HETEROGENEITY AND SYSTEMS AND METHODS FOR COMMUNICATING TEST RESULTS WOITACH, JOSEPH T 1687 §101 Final Rejection 126d overdue Pending Aug 31, 2021
17407000 METHODS AND SYSTEMS FOR DETERMINING THE CELLULAR ORIGIN OF CELL-FREE DNA ZEMAN, MARY K 1686 §103 Non-Final OA 73d overdue Pending Aug 19, 2021
17219338 DETERMINING TUMOR FRACTION FOR A SAMPLE BASED ON METHYL BINDING DOMAIN CALIBRATION DATA HAYES, JONATHAN EDWARD 1685 §101 Non-Final OA 60d overdue Pending Mar 31, 2021
17199286 METHODS FOR CLASSIFYING GENETIC MUTATIONS DETECTED IN CELL-FREE NUCLEIC ACIDS AS TUMOR OR NON-TUMOR ORIGIN SKIBINSKY, ANNA 1635 §103 Final Rejection 49d overdue Pending Mar 11, 2021
17162897 SIGNIFICANCE MODELING OF CLONAL-LEVEL ABSENCE OF TARGET VARIANTS VASSELL, MEREDITH ABBOTT 1687 §103 Non-Final OA 26d overdue Pending Jan 29, 2021
17135826 METHODS AND SYSTEMS FOR ANALYSIS OF CTCF BINDING REGIONS IN CELL-FREE DNA BAILEY, STEVEN WILLIAM 1687 §103 Final Rejection 28d Pending Dec 28, 2020
17000010 DETECTION AND TREATMENT OF DISEASE EXHIBITING DISEASE CELL HETEROGENEITY AND SYSTEMS AND METHODS FOR COMMUNICATING TEST RESULTS WOITACH, JOSEPH T 1687 §103 Final Rejection 23d overdue Pending Aug 21, 2020
16560752 METHODS AND SYSTEMS FOR DETECTING ALLELIC IMBALANCE IN CELL-FREE NUCLEIC ACID SAMPLES VASSELL, MEREDITH ABBOTT 1687 §101 Non-Final OA 79d overdue Pending Sep 04, 2019
16557931 METHODS AND SYSTEMS FOR DETECTING CONTAMINATION BETWEEN SAMPLES SCHULTZHAUS, JANNA NICOLE 1685 §103 Non-Final OA 8d Pending Aug 30, 2019
15796642 DIAGNOSTIC METHODS WOITACH, JOSEPH T 1687 §103 Final Rejection 99d overdue Pending Oct 27, 2017
15431395 DETECTION AND TREATMENT OF DISEASE EXHIBITING DISEASE CELL HETEROGENEITY AND SYSTEMS AND METHODS FOR COMMUNICATING TEST RESULTS WOITACH, JOSEPH T 1687 §101 Non-Final OA 30d overdue Pending Feb 13, 2017

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