Prosecution Insights
Last updated: October 26, 2026

HYDAC Technology GmbH

Technology area: Medical Devices & Mechanical Engineering

6 pending office actions • 3 art units • 5 examiners • 0 of 6 (0%) have an AI response strategy ready • 5 patents granted in the last 365 days

Analysis

HYDAC Technology GmbH has 6 pending office actions in Medical Devices & Mechanical Engineering. The matters involve 5 examiners across 3 art units, showing meaningful activity with some examiner concentration. This distribution calls for both centralized portfolio oversight and attention to the differing examination contexts.

LESLIE, MICHAEL S is the busiest examiner, with 2 pending matters. The remaining workload is spread among other examiners, so any recurring position in the matters assigned to Leslie should be evaluated for possible relevance to related applications, without treating it as a portfolio-wide rule.

The three-art-unit structure suggests that similar mechanical or medical concepts may be examined under different technical frameworks. Counsel should maintain a clear distinction between common specification support and claim-specific responses, while tracking how amendments affect related filings.

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

Portfolio Summary

6
Total Pending OAs
4
Non-Final OAs
1
Final Rejections
1
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.

4
Hard (67%)
1
Medium (17%)
1
Easy (17%)
0
Unknown (0%)

Rejection Statute Mix

BucketCases
§103 only1 (17%)
§112 only1 (17%)
Multi-statute (no §101)4 (67%)

Industry Mix

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

0
Life Sciences
0% of docket
0
Information Tech
0% of docket
0
Communications
0% of docket
0
Semiconductors
0% of docket
6
Mechanical / Eng
100% 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.

60 h
Manual time on pending OAs
12 h
Time saved (low, 20%)
21 h
Time saved (mid, 35%)
0.5 wks
FTE-weeks freed (mid)

Top Examiners on this docket

ExaminerApps on this docketAllow rateInterview lift
LESLIE, MICHAEL S 2 81.3% +14.4%
LEARY, JOSHUA DENNIS 1 90.0% +12.5%
LU, HAOTIAN 1 61.8% +35.3%
ZOLLINGER, NATHAN C 1 69.6% +40.0%
DURDEN, RICHARD KYLE 1 60.9% +29.0%

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
18849696 Piston Accumulator LESLIE, MICHAEL S —

Hard Cases (4)

Multi-statute / §101-driven matters, or cases in front of an examiner with an allow rate under 30%. The top 4 ordered by deadline are shown.

App #TitleExaminerDue in
19110504 Method LESLIE, MICHAEL S —
18853300 Expansion Device LEARY, JOSHUA DENNIS —
18699995 Bellows Accumulator LU, HAOTIAN —
18022354 PISTON ACCUMULATOR DURDEN, RICHARD KYLE —

Interview Candidates (6)

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 6 ordered by deadline are shown.

App #TitleExaminerDue in
19110504 Method LESLIE, MICHAEL S —
18853300 Expansion Device LEARY, JOSHUA DENNIS —
18849696 Piston Accumulator LESLIE, MICHAEL S —
18699995 Bellows Accumulator LU, HAOTIAN —
18571424 Hydraulic Accumulator ZOLLINGER, NATHAN C —
18022354 PISTON ACCUMULATOR DURDEN, RICHARD KYLE —

Top Art Units

Art UnitApps
3753 3
3745 2
3746 1

Pending Office Actions

App #TitleExaminerArt UnitStatutesStatusDue inAIFiled
19110504 Method LESLIE, MICHAEL S 3745 §102§112 Non-Final OA — Pending Mar 11, 2025
18853300 Expansion Device LEARY, JOSHUA DENNIS 3753 §102§103 Non-Final OA — Pending Oct 01, 2024
18849696 Piston Accumulator LESLIE, MICHAEL S 3745 §112 Non-Final OA — Pending Sep 23, 2024
18699995 Bellows Accumulator LU, HAOTIAN 3753 §102§103§112 Non-Final OA — Pending Apr 10, 2024
18571424 Hydraulic Accumulator ZOLLINGER, NATHAN C 3746 §103 Final Rejection — Pending Dec 18, 2023
18022354 PISTON ACCUMULATOR DURDEN, RICHARD KYLE 3753 §103§112 Non-Final OA — Pending Feb 21, 2023

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Frequently Asked Questions

How many pending USPTO office actions does HYDAC Technology GmbH have?

HYDAC Technology GmbH has 6 pending office actions as of October 2026, spread across 3 art units and 5 examiners.

Which USPTO examiner handles the most HYDAC Technology GmbH applications?

Michael S Leslie has the most, with 2 of HYDAC Technology GmbH's pending office actions.

What technology area are HYDAC Technology GmbH's patent applications in?

Mostly Medical Devices & Mechanical Engineering (USPTO Tech Center 3700), based on where its pending office actions are examined.

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