Prosecution Insights
Last updated: October 27, 2026

Mann+hummel GmbH

Technology area: Chemistry & Materials

20 pending office actions • 12 art units • 16 examiners • 0 of 20 (0%) have an AI response strategy ready • 31 patents granted in the last 365 days

Analysis

Mann+hummel GmbH has 21 pending office actions in Chemistry & Materials. The matters involve 17 examiners across 12 art units, showing a broad prosecution footprint with overlap at both assignment levels. JEONG, YOUNGSUL is the busiest examiner, with 3 pending matters.

The three matters assigned to JEONG, YOUNGSUL create a defined opportunity for coordinated review of examiner positions and recurring claim issues. The rest of the portfolio remains distributed across many examiners and art units, so centralized oversight should be paired with record-specific response planning.

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

Portfolio Summary

20
Total Pending OAs
11
Non-Final OAs
6
Final Rejections
3
Advisory / Quayle

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.

12
Hard (60%)
8
Medium (40%)
0
Easy (0%)
0
Unknown (0%)

Rejection Statute Mix

BucketCases
§103 only7 (35%)
§102 only1 (5%)
Multi-statute (no §101)12 (60%)

Industry Mix

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

19
Life Sciences
95% of docket
0
Information Tech
0% of docket
0
Communications
0% of docket
0
Semiconductors
0% of docket
1
Mechanical / Eng
5% 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.

200 h
Manual time on pending OAs
40 h
Time saved (low, 20%)
70 h
Time saved (mid, 35%)
1.8 wks
FTE-weeks freed (mid)

Top Examiners on this docket

ExaminerApps on this docketAllow rateInterview lift
JEONG, YOUNGSUL 3 71.6% +21.7%
BUI, DUNG H 2 77.8% +25.5%
HE, QIANPING 2 66.2% +15.8%
CLEMENTE, ROBERT ARTHUR 1 80.9% +7.5%
YE, XINWEN 1 43.1% +44.3%
SPIES, BRADLEY R 1 74.1% +19.1%
FAULKNER, RYAN L 1 67.7% +16.8%
EZELUOMBA, MIRIAM NCHEKWUBECHU 1 94.1% +0.0%
ZEMUI, NATHANAEL T 1 55.6% +23.7%
ROSA BERRIOS, NICOLAS JENNIEL 1 — —

Quick Wins (2)

Cases in front of an examiner with an allow rate of 80%+ where the difficulty is Easy or Medium. The top 2 ordered by deadline are shown.

App #TitleExaminerDue in
18939095 FILTER SYSTEM AND FILTER ELEMENT CLEMENTE, ROBERT ARTHUR —
18634455 FILTER ELEMENT AND FILTER SYSTEM EZELUOMBA, MIRIAM NCHEKWUBECHU —

Hard Cases (12)

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
18897017 CASTING SHELL FOR A CASTING DEVICE AND METHOD FOR MANUFACTURING A FILTER ELEMENT YE, XINWEN —
18830664 INTERIOR ROOM AIR FILTER MODULE AND FILTER ASSEMBLY BUI, DUNG H —
18648717 ROUND FILTER ELEMENT FOR FILTERING GASEOUS FLUID HE, QIANPING —
18641415 DEGASSING UNIT FOR ELECTRONICS HOUSING AND ELECTRONICS HOUSING COMPRISING DEGASSING UNIT FAULKNER, RYAN L —
18595420 ASSEMBLY SET FOR VENTING UNIT FOR VENTING ELECTRONICS HOUSING ROSA BERRIOS, NICOLAS JENNIEL —
18442030 DEGASSING UNIT AND BATTERY HOUSING CULLEN, SEAN P —
18510767 Filter System with a Filter Element and a Safety Assembly, a Safety Assembly, and a Filter Element JEONG, YOUNGSUL —
18510751 Filter System with a Filter Element and a Safety Assembly, a Safety Assembly, and a Filter Element JEONG, YOUNGSUL —

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
18897017 CASTING SHELL FOR A CASTING DEVICE AND METHOD FOR MANUFACTURING A FILTER ELEMENT YE, XINWEN —
18830664 INTERIOR ROOM AIR FILTER MODULE AND FILTER ASSEMBLY BUI, DUNG H —
18648717 ROUND FILTER ELEMENT FOR FILTERING GASEOUS FLUID HE, QIANPING —
18642764 CLOSURE ELEMENT FOR DRAINAGE OPENING OF FILTER SYSTEM, FILTER HOUSING PART OF FILTER SYSTEM, FILTER ELEMENT, AND FILTER SYSTEM SPIES, BRADLEY R —
18641415 DEGASSING UNIT FOR ELECTRONICS HOUSING AND ELECTRONICS HOUSING COMPRISING DEGASSING UNIT FAULKNER, RYAN L —
18597859 VENTING AND SEPARATING DEVICE FOR HOUSING OF BATTERY ZEMUI, NATHANAEL T —
18532155 Air Filter Medium, Filter Medium Body, and Filter Element HE, QIANPING —
18510767 Filter System with a Filter Element and a Safety Assembly, a Safety Assembly, and a Filter Element JEONG, YOUNGSUL —

Top Art Units

Art UnitApps
1776 5
1773 3
1772 3
1754 1
3762 1
1727 1
1741 1
1725 1
1779 1
1744 1

Pending Office Actions

App #TitleExaminerArt UnitStatutesStatusDue inAIFiled
18939095 FILTER SYSTEM AND FILTER ELEMENT CLEMENTE, ROBERT ARTHUR 1773 §102 Non-Final OA — Pending Nov 06, 2024
18897017 CASTING SHELL FOR A CASTING DEVICE AND METHOD FOR MANUFACTURING A FILTER ELEMENT YE, XINWEN 1754 §102§103 Final Rejection — Pending Sep 26, 2024
18830664 INTERIOR ROOM AIR FILTER MODULE AND FILTER ASSEMBLY BUI, DUNG H 1773 §103§112 Non-Final OA — Pending Sep 11, 2024
18648717 ROUND FILTER ELEMENT FOR FILTERING GASEOUS FLUID HE, QIANPING 1776 §102§103 Final Rejection — Pending Apr 29, 2024
18642764 CLOSURE ELEMENT FOR DRAINAGE OPENING OF FILTER SYSTEM, FILTER HOUSING PART OF FILTER SYSTEM, FILTER ELEMENT, AND FILTER SYSTEM SPIES, BRADLEY R 1776 §103 Non-Final OA — Pending Apr 22, 2024
18641415 DEGASSING UNIT FOR ELECTRONICS HOUSING AND ELECTRONICS HOUSING COMPRISING DEGASSING UNIT FAULKNER, RYAN L 3762 §102§103§112 Non-Final OA — Pending Apr 21, 2024
18634455 FILTER ELEMENT AND FILTER SYSTEM EZELUOMBA, MIRIAM NCHEKWUBECHU 1776 §103 Final Rejection — Pending Apr 12, 2024
18597859 VENTING AND SEPARATING DEVICE FOR HOUSING OF BATTERY ZEMUI, NATHANAEL T 1727 §103 Non-Final OA — Pending Mar 06, 2024
18595420 ASSEMBLY SET FOR VENTING UNIT FOR VENTING ELECTRONICS HOUSING ROSA BERRIOS, NICOLAS JENNIEL 1741 §102§103 Non-Final OA — Pending Mar 05, 2024
18442030 DEGASSING UNIT AND BATTERY HOUSING CULLEN, SEAN P 1725 §102§112 Non-Final OA — Pending Feb 14, 2024
18430633 VENTING UNIT FOR VENTING MACHINERY SPACE MOK, ALEX W 1779 §103 Non-Final OA — Pending Feb 01, 2024
18404907 BATTERY DRYING DEVICE HO, ANDREW YEWHONG 1744 §103 Non-Final OA — Pending Jan 05, 2024
18532155 Air Filter Medium, Filter Medium Body, and Filter Element HE, QIANPING 1776 §103 Non-Final OA — Pending Dec 07, 2023
18510767 Filter System with a Filter Element and a Safety Assembly, a Safety Assembly, and a Filter Element JEONG, YOUNGSUL 1772 §102§103 Non-Final OA — Pending Nov 16, 2023
18510751 Filter System with a Filter Element and a Safety Assembly, a Safety Assembly, and a Filter Element JEONG, YOUNGSUL 1772 §102§103 Non-Final OA — Pending Nov 16, 2023
18506601 FILTER SYSTEM COMPRISING A RESONATOR BUI, DUNG H 1773 §102§103§112 Non-Final OA — Pending Nov 10, 2023
18466410 FILTER ELEMENT AND FILTER SYSTEM ALI, WAQAAS A 1777 §102§103 Final Rejection — Pending Sep 13, 2023
18464037 WATER SEPARATOR WITH THROTTLE ELEMENT AND FUEL CELL SYSTEM WITH WATER SEPARATOR D'ANIELLO, NICHOLAS P 1723 §102§103 Non-Final OA — Pending Sep 08, 2023
18450461 SORPTION FILTER ELEMENT SLAUGOVSKY, RACHEL MARIE 1776 §102§103 Final Rejection — Pending Aug 16, 2023
18180203 Filter System and Filter Element JEONG, YOUNGSUL 1772 §103 Final Rejection — Pending Mar 08, 2023

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Frequently Asked Questions

How many pending USPTO office actions does Mann+hummel GmbH have?

Mann+hummel GmbH has 20 pending office actions as of October 2026, spread across 12 art units and 16 examiners.

Which USPTO examiner handles the most Mann+hummel GmbH applications?

Youngsul Jeong has the most, with 3 of Mann+hummel GmbH's pending office actions.

What technology area are Mann+hummel GmbH's patent applications in?

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

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