Prosecution Insights
Last updated: October 25, 2026

Guardant Health Inc.

Technology area: Biotechnology & Pharmaceuticals

23 pending office actions • 9 art units • 21 examiners • 0 of 23 (0%) have an AI response strategy ready • 33 patents granted in the last 365 days

Analysis

Guardant Health Inc. has 23 pending office actions within the Biotechnology & Pharmaceuticals technology area. These 23 pending office actions are assigned to 21 distinct examiners across 9 distinct art units. This indicates that nearly every pending action is being handled by a different examiner. The 9 distinct art units suggest that the company's biotechnology and pharmaceutical filings fall into several different specialized categories.

The busiest examiner, YU, TIAN NMN, is responsible for 2 busiest examiner pending actions. With 21 distinct examiners involved, the company must manage a wide range of examiner perspectives for its 23 pending office actions. The 2 busiest examiner pending actions represent a small portion of the total workload. Practitioners should coordinate their strategies across the 9 distinct art units to ensure consistency.

The involvement of 21 distinct examiners provides a broad range of feedback on the company's innovations. Practitioners should monitor the 2 busiest examiner pending actions for trends that may impact the other 23 pending office actions. Managing the matters across 9 distinct art units requires a coordinated approach to maintain consistency in the Biotechnology & Pharmaceuticals technology area.

Written from this page's own data; every figure is computed from USPTO records and verified before publication.

Portfolio Summary

23
Total Pending OAs
13
Non-Final OAs
10
Final Rejections
0
Advisory / Quayle

Response Deadline Pressure

Based on the USPTO statutory response window for each pending office action. 9 of the docket's apps have a known mailing date; the rest are excluded from the tile counts.

6
Overdue
0
Due this week
1
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. 9 of the docket's apps have a known mailing date.

-30dToday30d60d90d120d
Overdue (6)Due ≤ 30 days (1)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.

16
Hard (70%)
7
Medium (30%)
0
Easy (0%)
0
Unknown (0%)

Rejection Statute Mix

BucketCases
§101 only4 (17%)
§101 + other10 (43%)
§103 only4 (17%)
Double-patenting + other3 (13%)
Multi-statute (no §101)2 (9%)

Industry Mix

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

18
Life Sciences
78% of docket
1
Information Tech
4% of docket
0
Communications
0% of docket
0
Semiconductors
0% of docket
4
Mechanical / Eng
17% 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.

230 h
Manual time on pending OAs
46 h
Time saved (low, 20%)
80 h
Time saved (mid, 35%)
2.0 wks
FTE-weeks freed (mid)

Top Examiners on this docket

ExaminerApps on this docketAllow rateInterview lift
WILDER, CYNTHIA B 2 70.8% +27.0%
YU, TIAN NMN 2 55.6% +19.3%
LIU, GUOZHEN 1 48.1% +26.0%
WANG, CHAO 1 80.8% +81.2%
BROWN, MINDY G 1 57.8% +40.5%
KHATTAR, RAJESH 1 36.9% +35.6%
SANGHERA, STEVEN G.S. 1 30.3% +29.7%
GREENE, CAROLYN LEE 1 65.7% +46.1%
MONTGOMERY, ANN Y 1 69.1% +27.6%
JONES, CHRISTINE MICHELLE 1 0.0% +0.0%

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
19221319 METHODS AND SYSTEMS FOR SECURE SOFTWARE DELIVERY WANG, CHAO —

Hard Cases (17)

Multi-statute / §101-driven matters, or cases in front of an examiner with an allow rate under 30%. The top 8 ordered by deadline are shown.

App #TitleExaminerDue in
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 BROWN, MINDY G 37d overdue
18506858 METHODS AND COMPOSITIONS FOR COPY-NUMBER INFORMED TISSUE-OF-ORIGIN ANALYSIS JONES, CHRISTINE MICHELLE 31d overdue
17823915 DATA REPOSITORY, SYSTEM, AND METHOD FOR COHORT SELECTION REYES, REGINALD R 69d
18920396 GENOMIC AND METHYLATION BIOMARKERS FOR DETERMINING PATIENT RISK OF HEART DISEASE AND NOVEL GENOMIC AND EPIGENOMIC DRUG TARGETS TO DECREASE RISK OF HEART DISEASE AND/OR IMPROVE PATIENT OUTCOME AFTER MYOCARDIAL INFARCTION OR CARDIAC INJURY KHATTAR, RAJESH —
18817550 METHODS FOR ANALYZING CYTOSINE METHYLATION AND HYDROXYMETHYLATION GREENE, CAROLYN LEE —

Interview Candidates (11)

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
18907227 DETECTING THE PRESENCE OF A TUMOR BASED ON METHYLATION STATUS OF CELL-FREE NUCLEIC ACID MOLECULES SANGHERA, STEVEN G.S. 67d overdue
18339116 METHODS AND SYSTEMS FOR ANALYZING METHYLATED POLYNUCLEOTIDES WILDER, CYNTHIA B 60d overdue
19018456 METHODS FOR EARLY DETECTION OF CANCER BROWN, MINDY G 37d overdue
18325759 COMPOSITIONS AND METHODS FOR ENRICHING METHYLATED POLYNUCLEOTIDES YU, TIAN NMN 14d
19239357 METHODS FOR MULTI-RESOLUTION ANALYSIS OF CELL-FREE NUCLEIC ACIDS LIU, GUOZHEN 56d
19637857 METHODS FOR EARLY DETECTION OF CANCER WILDER, CYNTHIA B —
19221319 METHODS AND SYSTEMS FOR SECURE SOFTWARE DELIVERY WANG, CHAO —
18920396 GENOMIC AND METHYLATION BIOMARKERS FOR DETERMINING PATIENT RISK OF HEART DISEASE AND NOVEL GENOMIC AND EPIGENOMIC DRUG TARGETS TO DECREASE RISK OF HEART DISEASE AND/OR IMPROVE PATIENT OUTCOME AFTER MYOCARDIAL INFARCTION OR CARDIAC INJURY KHATTAR, RAJESH —

Top Art Units

Art UnitApps
1681 5
1687 5
1686 3
3684 3
1682 3
2439 1
1683 1
1678 1
3685 1

Pending Office Actions

App #TitleExaminerArt UnitStatutesStatusDue inAIFiled
19637857 METHODS FOR EARLY DETECTION OF CANCER WILDER, CYNTHIA B 1681 §103 Final Rejection — Pending Apr 02, 2026
19239357 METHODS FOR MULTI-RESOLUTION ANALYSIS OF CELL-FREE NUCLEIC ACIDS LIU, GUOZHEN 1686 §103 Final Rejection 56d Pending Jun 16, 2025
19221319 METHODS AND SYSTEMS FOR SECURE SOFTWARE DELIVERY WANG, CHAO 2439 §103 Non-Final OA — Pending May 28, 2025
19018456 METHODS FOR EARLY DETECTION OF CANCER BROWN, MINDY G 1683 §101 Non-Final OA 37d overdue Pending Jan 13, 2025
18920396 GENOMIC AND METHYLATION BIOMARKERS FOR DETERMINING PATIENT RISK OF HEART DISEASE AND NOVEL GENOMIC AND EPIGENOMIC DRUG TARGETS TO DECREASE RISK OF HEART DISEASE AND/OR IMPROVE PATIENT OUTCOME AFTER MYOCARDIAL INFARCTION OR CARDIAC INJURY KHATTAR, RAJESH 3684 §101§103§112 Final Rejection — Pending Oct 18, 2024
18907227 DETECTING THE PRESENCE OF A TUMOR BASED ON METHYLATION STATUS OF CELL-FREE NUCLEIC ACID MOLECULES SANGHERA, STEVEN G.S. 3684 §101§103 Final Rejection 67d overdue Pending Oct 04, 2024
18817550 METHODS FOR ANALYZING CYTOSINE METHYLATION AND HYDROXYMETHYLATION GREENE, CAROLYN LEE 1681 §102§103§112 Non-Final OA — Pending Aug 28, 2024
18620056 METHODS FOR EARLY DETECTION OF CANCER YU, TIAN NMN 1681 §103DP Non-Final OA — Pending Mar 28, 2024
18506573 COMPOSITIONS AND METHODS FOR ASSAYING CIRCULATING MOLECULES MONTGOMERY, ANN Y 1678 §102§103§112 Non-Final OA — Pending Nov 10, 2023
18506858 METHODS AND COMPOSITIONS FOR COPY-NUMBER INFORMED TISSUE-OF-ORIGIN ANALYSIS JONES, CHRISTINE MICHELLE 1682 §102§103§112DP Final Rejection 31d overdue Pending Nov 10, 2023
18451739 DETERMINING A DYNAMIC QUALITY METRIC OF A BIOPSY SAMPLE LEVERETT, MARY CHANG 1687 §101§103§112 Non-Final OA — Pending Aug 17, 2023
18339116 METHODS AND SYSTEMS FOR ANALYZING METHYLATED POLYNUCLEOTIDES WILDER, CYNTHIA B 1681 §103 Final Rejection 60d overdue Pending Jun 21, 2023
18325759 COMPOSITIONS AND METHODS FOR ENRICHING METHYLATED POLYNUCLEOTIDES YU, TIAN NMN 1681 §103DP Final Rejection 14d Pending May 30, 2023
18314736 DETECTING DEGRADATION BASED ON STRAND BIAS LUO, JAMMY NMN 1686 §101§103 Non-Final OA — Pending May 09, 2023
18172734 METHODS AND SYSTEMS FOR PREDICTING AN ORIGIN OF A VARIANT LI, SUN M 3685 §101 Non-Final OA — Pending Feb 22, 2023
18050855 METHODS AND SYSTEMS FOR IMPROVING PATIENT MONITORING AFTER SURGERY SALMON, KATHERINE D 1682 §101§103§112 Non-Final OA — Pending Oct 28, 2022
17823915 DATA REPOSITORY, SYSTEM, AND METHOD FOR COHORT SELECTION REYES, REGINALD R 3684 §101 Non-Final OA 69d Pending Aug 31, 2022
17687536 METHODS AND RELATED ASPECTS FOR ANALYZING MOLECULAR RESPONSE BUCHANAN, BAILEY CHEYENNE 1682 §101§103§112 Final Rejection — Pending Mar 04, 2022
17552728 METHODS TO DETERMINE TUMOR GENE COPY NUMBER BY ANALYSIS OF CELL-FREE DNA WOITACH, JOSEPH T 1687 §101§112Other Non-Final OA — Pending Dec 16, 2021
17459743 COMPUTATIONAL DETECTION OF COPY NUMBER VARIATION AT A LOCUS IN THE ABSENCE OF DIRECT MEASUREMENT OF THE LOCUS ANDERSON-FEARS, KEENAN NEIL 1687 §101§112 Non-Final OA — Pending Aug 27, 2021
17407000 METHODS AND SYSTEMS FOR DETERMINING THE CELLULAR ORIGIN OF CELL-FREE DNA ZEMAN, MARY K 1686 §101 Final Rejection 73d overdue Pending Aug 19, 2021
16560752 METHODS AND SYSTEMS FOR DETECTING ALLELIC IMBALANCE IN CELL-FREE NUCLEIC ACID SAMPLES VASSELL, MEREDITH ABBOTT 1687 §101§112 Final Rejection 79d overdue Pending Sep 04, 2019
16429997 METHODS AND SYSTEMS FOR DETERMINING The CELLULAR ORIGIN OF CELL-FREE NUCLEIC ACIDS PULLIAM, JOSEPH CONSTANTINE 1687 §101§112 Non-Final OA — Pending Jun 03, 2019

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Frequently Asked Questions

How many pending USPTO office actions does Guardant Health Inc. have?

Guardant Health Inc. has 23 pending office actions as of October 2026, spread across 9 art units and 21 examiners.

Which USPTO examiner handles the most Guardant Health Inc. applications?

Cynthia B Wilder has the most, with 2 of Guardant Health Inc.'s pending office actions.

What technology area are Guardant Health Inc.'s patent applications in?

Mostly Biotechnology & Pharmaceuticals (USPTO Tech Center 1600), based on where its pending office actions are examined.

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