Prosecution Insights
Last updated: October 25, 2026

Entegris Inc.

Technology areas: Chemistry & Materials • Medical Devices & Mechanical Engineering

76 pending office actions • 42 art units • 59 examiners • 0 of 76 (0%) have an AI response strategy ready • 69 patents granted in the last 365 days

Analysis

Entegris Inc. has 78 pending office actions in Chemistry & Materials. The docket spans 62 distinct examiners and 46 distinct art units, reflecting broad examination coverage and substantial coordination demands. Multiple matters are therefore associated with the same examiner or art-unit setting, even though the portfolio remains widely distributed.

MENON, KRISHNAN S is the busiest examiner, with 5 pending matters. That concentration identifies a useful focal point for examiner-specific tracking, but it does not represent the full prosecution structure. Counsel should combine centralized docket controls with art-unit and examiner review, particularly when developing consistent positions for related technologies.

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

Portfolio Summary

76
Total Pending OAs
40
Non-Final OAs
30
Final Rejections
6
Advisory / Quayle

Response Deadline Pressure

Based on the USPTO statutory response window for each pending office action. 18 of the docket's apps have a known mailing date; the rest are excluded from the tile counts.

5
Overdue
1
Due this week
7
Due this month
2
Due in next 60 days
3
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. 18 of the docket's apps have a known mailing date.

-30dToday30d60d90d120d
Overdue (5)Due ≤ 7 days (1)Due ≤ 30 days (7)Due ≤ 60 days (2)Due later (3)

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.

42
Hard (55%)
31
Medium (41%)
3
Easy (4%)
0
Unknown (0%)

Rejection Statute Mix

BucketCases
§101 + other1 (1%)
§103 only26 (34%)
§102 only3 (4%)
§112 only2 (3%)
Double-patenting only1 (1%)
Double-patenting + other2 (3%)
Multi-statute (no §101)41 (54%)

Industry Mix

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

49
Life Sciences
64% of docket
0
Information Tech
0% of docket
0
Communications
0% of docket
7
Semiconductors
9% of docket
19
Mechanical / Eng
25% of docket
1
Business / Other
1% 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.

760 h
Manual time on pending OAs
152 h
Time saved (low, 20%)
266 h
Time saved (mid, 35%)
6.7 wks
FTE-weeks freed (mid)

Top Examiners on this docket

ExaminerApps on this docketAllow rateInterview lift
MENON, KRISHNAN S 5 59.7% +11.3%
SPICER, JENINE MARIE 5 51.0% +19.1%
GRANO, ERNESTO ARTURIO 2 61.2% +25.3%
ALANKO, ANITA KAREN 2 69.9% -16.1%
MAUST, TIMOTHY LEWIS 2 81.8% +10.3%
MCCULLOUGH, ERIC J. 2 31.9% +43.1%
GONZALEZ, MADELINE 2 72.4% +16.0%
ALI, WAQAAS A 2 81.1% +17.8%
BAKSHI, PANCHAM 2 76.7% +30.2%
AHMED, SHAMIM 2 78.5% +22.1%

Hard Cases (42)

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
18732519 OPTICAL PARTICLE COUNTER AND METHODS HANSEN, JONATHAN M 52d overdue
17961470 MODULAR TRAY FOR SOLID CHEMICAL VAPORIZING CHAMBER MOORE, KARLA A 2d overdue
18740426 BAG FITMENT HAVING INTERNAL SPIKE PORT PATTERSON, MICHAEL CHRISTOPHER 5d
18077058 LIQUID FILTER UNIT WITH LATERALLY ARRANGED FILTERS, AND METHOD OF OPERATING THEREOF ALI, WAQAAS A 14d
17375855 KIT FOR INSTALLING IMPELLER INTO PROCESS VESSEL NGUYEN, HENRY H 22d
18077813 LIQUID FILTER UNIT WITH VERTICALLY ARRANGED FILTERS, AND METHOD OF OPERATING THEREOF GONZALEZ, MADELINE 30d
18097657 WOUND-PLEATED FILTERS AND RELATED METHODS MENON, KRISHNAN S 47d
18603048 WIDE INSERTION ANGLE PROCESS CARRIER BUI, LUAN KIM 76d

Interview Candidates (24)

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
18231926 METHODS AND MATERIALS FOR POLISHING OF MATERIALS AHMED, SHAMIM 44d overdue
18077058 LIQUID FILTER UNIT WITH LATERALLY ARRANGED FILTERS, AND METHOD OF OPERATING THEREOF ALI, WAQAAS A 14d
18077813 LIQUID FILTER UNIT WITH VERTICALLY ARRANGED FILTERS, AND METHOD OF OPERATING THEREOF GONZALEZ, MADELINE 30d
18097657 WOUND-PLEATED FILTERS AND RELATED METHODS MENON, KRISHNAN S 47d
19200333 CONTAINER POD AND RELATED SYSTEMS AND METHODS GRANO, ERNESTO ARTURIO —
19200397 RETICLE POD GRANO, ERNESTO ARTURIO —
18786243 HYDROPHILIC FILTER MEMBRANE WITH PENDANT HYDROPHILIC GROUPS, AND RELATED METHODS OF PREPARATION AND USE MENON, KRISHNAN S —
18778864 METHOD AND DEVICE TO DISTRIBUTE GAS INTO A CONTAINER MAUST, TIMOTHY LEWIS —

Top Art Units

Art UnitApps
3736 7
1773 7
1713 6
1776 3
1777 3
1716 3
3735 2
1787 2
2882 2
1771 2

Pending Office Actions

App #TitleExaminerArt UnitStatutesStatusDue inAIFiled
19231294 AERODYNAMIC BLAST FREEZE CONTAINERS HICKS, ROBERT J 3733 §112 Non-Final OA — Pending Jun 06, 2025
19205981 WAFER CONTAINER PURGE PORT ASSEMBLY GEHMAN, BRYON P 3736 DP Final Rejection — Pending May 12, 2025
19200333 CONTAINER POD AND RELATED SYSTEMS AND METHODS GRANO, ERNESTO ARTURIO 3735 §103§112 Non-Final OA — Pending May 06, 2025
19200397 RETICLE POD GRANO, ERNESTO ARTURIO 3735 §102 Non-Final OA — Pending May 06, 2025
19060599 ALUMINUM-CONTAINING INHIBITOR COMPOUNDS FOR SELECTIVE DEPOSITION FLETCHER III, WILLIAM P — §102§103 Non-Final OA — Pending Feb 21, 2025
19044236 AREA SELECTIVE DEPOSITION OF ALUMINUM BASED FILMS USING ALKYL ALUMINUM AMIDINATE PRECURSORS WEDDLE, ALEXANDER MARION 1712 §101§102§112 Non-Final OA — Pending Feb 03, 2025
19002615 MULTI-METAL OXIDE COATINGS, RELATED DEVICES AND METHODS JACKSON, MONIQUE R 1787 §102§103§112 Non-Final OA — Pending Dec 26, 2024
18942306 RETICLE POD WITH AIR FLOW MANAGEMENT FEATURE ASFAW, MESFIN T 2882 §103 Final Rejection — Pending Nov 08, 2024
18907434 TEMPERATURE PROBE INSERT, ASSEMBLY THEREOF, AND KIT THEREOF BAIR, EMMA CATHERINE 2855 §103 Non-Final OA — Pending Oct 04, 2024
18898556 METHODS FOR CONTROLLING CRYSTALLINE PHASE OF MOLYBDENUM PRECURSORS AND RELATED COMPOSITIONS KUNEMUND, ROBERT M 1714 §102§103 Non-Final OA — Pending Sep 26, 2024
18892069 CONTACTS FOR REDUCING WEAR IN A RETICLE CONTAINER PERSAUD, DEORAM 2882 §102§103 Final Rejection — Pending Sep 20, 2024
18887935 ETCHANT COMPOSITIONS AND RELATED METHODS ALANKO, ANITA KAREN 1713 §102§103 Non-Final OA — Pending Sep 17, 2024
18794561 ION IMPLANTATION METHOD AND RELATED SYSTEMS LOUIE, MANDY C 1715 §103 Non-Final OA — Pending Aug 05, 2024
18786243 HYDROPHILIC FILTER MEMBRANE WITH PENDANT HYDROPHILIC GROUPS, AND RELATED METHODS OF PREPARATION AND USE MENON, KRISHNAN S 1771 §102§103 Non-Final OA — Pending Jul 26, 2024
18780569 SURFACE MODIFIED SUBSTRATES AND RELATED METHODS CHRISTY, KATHERINE A 1787 §103 Non-Final OA — Pending Jul 23, 2024
18778864 METHOD AND DEVICE TO DISTRIBUTE GAS INTO A CONTAINER MAUST, TIMOTHY LEWIS 3753 §102§103 Non-Final OA — Pending Jul 19, 2024
18774874 LIGAND-MODIFIED FILTER AND METHODS FOR REDUCING METALS FROM LIQUID COMPOSITIONS MENON, KRISHNAN S 1771 §102§103 Non-Final OA — Pending Jul 16, 2024
18769237 METAL GETTERS IN VAPORIZERS FOR IMPURITY REMOVAL HOPKINS, ROBERT A 1776 §102 Non-Final OA — Pending Jul 10, 2024
18767649 DIFFUSERS IN VAPORIZERS AND RELATED METHODS BUI, DUNG H 1773 §102§103 Non-Final OA — Pending Jul 09, 2024
18761281 MEMBRANES FOR REMOVING METALLIC SPECIES FROM AMINES MCCULLOUGH, ERIC J. 1773 §103§112 Final Rejection — Pending Jul 01, 2024
18754148 COATINGS FOR ENHANCEMENT OF PROPERTIES AND PERFORMANCE OF SUBSTRATE ARTICLES AND APPARATUS SAMPLE, DAVID R 1784 §102§103 Non-Final OA — Pending Jun 26, 2024
18740426 BAG FITMENT HAVING INTERNAL SPIKE PORT PATTERSON, MICHAEL CHRISTOPHER 3754 §102§103 Final Rejection 5d Pending Jun 11, 2024
18732519 OPTICAL PARTICLE COUNTER AND METHODS HANSEN, JONATHAN M 2877 §102§103 Non-Final OA 52d overdue Pending Jun 03, 2024
18657535 ION IMPLANTATION SYSTEM AND RELATED METHODS SMYTH, ANDREW P 2881 §103 Final Rejection — Pending May 07, 2024
18651833 ELECTROSTATIC CHUCKS AND RELATED METHODS KHLOK, BONITA 3761 §103§112 Non-Final OA — Pending May 01, 2024
18648149 METHOD AND DEVICE TO DISTRIBUTE GAS INTO A CONTAINER MAUST, TIMOTHY LEWIS 3753 §102§103§112 Non-Final OA — Pending Apr 26, 2024
18624231 SOLVENT SYSTEMS FOR SELECTIVE REMOVAL OF POLYMERIC MATERIALS CHACKO DAVIS, DABORAH 1737 §102§103 Non-Final OA — Pending Apr 02, 2024
18620801 ADDITIVE MANUFACTURED ARTICLES HAVING COATED SURFACES AND RELATED METHODS DUMBRIS, SETH M 1784 §103 Final Rejection 61d Pending Mar 28, 2024
18615108 DRY-PROCESS MEMBRANE FOR FILTRATION ORME, PATRICK JAMES 1779 §103§112 Non-Final OA — Pending Mar 25, 2024
18607286 POROUS SINTERED METAL BODIES AND METHODS OF PREPARING POROUS SINTERED METAL BODIES HEVEY, JOHN A 1735 §103§112 Non-Final OA — Pending Mar 15, 2024
18603048 WIDE INSERTION ANGLE PROCESS CARRIER BUI, LUAN KIM 3736 §102§103 Non-Final OA 76d Pending Mar 12, 2024
18430567 WET ETCH FORMULATIONS AND RELATED METHODS PHAM, THOMAS T 1713 §103 Final Rejection — Pending Feb 01, 2024
18420661 SPACERS FOR FILTRATION APPLICATIONS GONZALEZ, MADELINE 1773 §102§103 Non-Final OA — Pending Jan 23, 2024
18416626 PEEK MEMBRANES AND RELATED METHODS AND DEVICES ROTONDI, CONNOR JON 1779 §103 Non-Final OA — Pending Jan 18, 2024
18410595 ADSORBENT THAT CONTAINS POTASSIUM HYDROXIDE AND POTASSIUM CARBONATE, AND RELATED METHODS AND DEVICES MCCAIG, BRIAN A 1772 §103 Final Rejection — Pending Jan 11, 2024
18403858 METHOD FOR SELECTIVE DEPOSITION ON DIELECTRIC MATERIALS MCCLURE, CHRISTINA D 2898 §103 Non-Final OA — Pending Jan 04, 2024
18527045 METHODS AND SYSTEMS FOR REMOVING HYDROGEN PEROXIDE FROM A GAS JOYNER, KEVIN 1799 §103§112 Non-Final OA — Pending Dec 01, 2023
18515101 BAG AND BAG FITMENT INCLUDING RIGID FLUOROPOLYMER SPIKE PORT KALIHER, HANS CHRISTIAN 3781 §103 Final Rejection 9d overdue Pending Nov 20, 2023
18513001 DISILYLAMINE PRECURSORS AND RELATED METHODS CARR, DEBORAH D 1691 §102§112 Non-Final OA — Pending Nov 17, 2023
18511579 FASTENING ASSEMBLY WITH DETACHABLE LOCK PIN AND ENGAGING MEMBER SPICER, JENINE MARIE 3736 §103 Final Rejection — Pending Nov 16, 2023
18383445 MULTIPORT FILTER HOUSING AND FILTER THEREOF ALI, WAQAAS A 1774 §102§103 Final Rejection — Pending Oct 24, 2023
18379060 UNIFIED LATCH FOR WAFER CASSETTES SPICER, JENINE MARIE 3736 §102§103 Final Rejection — Pending Oct 11, 2023
18378618 COMPOUNDS AND METHODS FOR PREPARATION OF ALUMINATES KUMAR, SRILAKSHMI K 1700 §103§112 Final Rejection — Pending Oct 10, 2023
18376226 ETCHANT COMPOSITIONS AND RELATED METHODS DUCLAIR, STEPHANIE P. 1713 §103 Final Rejection — Pending Oct 03, 2023
18240151 BIS (ARENE) METAL COMPLEXES AND RELATED METHODS BAKSHI, PANCHAM 1623 §112DP Non-Final OA — Pending Aug 30, 2023
18240254 COMPOSITIONS FOR EXTREME ULTRAVIOLET LITHOGRAPHY AND RELATED METHODS BONAPARTE, AMY C 1692 §102DP Non-Final OA — Pending Aug 30, 2023
18239661 INDENYL PRECURSORS BAKSHI, PANCHAM 1623 §102§103 Non-Final OA — Pending Aug 29, 2023
18231926 METHODS AND MATERIALS FOR POLISHING OF MATERIALS AHMED, SHAMIM 1713 §103 Final Rejection 44d overdue Pending Aug 09, 2023
18219447 PROCESS FOR PREPARING PHOSPHONATE ESTERS CHAO, ALLEN 1622 §102§103 Final Rejection — Pending Jul 07, 2023
18215757 MODULES FOR DELIVERY SYSTEMS AND RELATED METHODS BERMAN, JASON 1794 §103 Final Rejection 40d Pending Jun 28, 2023

View all 76 →

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Frequently Asked Questions

How many pending USPTO office actions does Entegris Inc. have?

Entegris Inc. has 76 pending office actions as of October 2026, spread across 42 art units and 59 examiners.

Which USPTO examiner handles the most Entegris Inc. applications?

Krishnan S Menon has the most, with 5 of Entegris Inc.'s pending office actions.

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

Mostly Chemistry & Materials (USPTO Tech Center 1700), based on where its pending office actions are examined.

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