Prosecution Insights
Last updated: October 25, 2026

NxStage Medical Inc.

Technology area: Medical Devices & Mechanical Engineering

4 pending office actions • 2 art units • 3 examiners • 0 of 4 (0%) have an AI response strategy ready • 10 patents granted in the last 365 days

Analysis

NxStage Medical Inc. has 4 pending office actions within the Medical Devices & Mechanical Engineering technology area. These actions are distributed among 3 distinct examiners and 2 distinct art units. This distribution shows a higher concentration of cases per art unit compared to the number of examiners involved, suggesting that the company's technology is focused within a few specific administrative groups.

KOO, BENJAMIN K is the busiest examiner for the company, managing 2 pending office actions. This busiest examiner pending count of 2 accounts for 2 of the 4 pending office actions. The remaining actions are split among the other distinct examiners, indicating that KOO, BENJAMIN K is a primary point of contact for the company's current prosecution efforts. This concentration suggests that his specific examination style will significantly impact the overall success rate of the current portfolio.

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

Portfolio Summary

4
Total Pending OAs
2
Non-Final OAs
2
Final Rejections
0
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.

1
Hard (25%)
3
Medium (75%)
0
Easy (0%)
0
Unknown (0%)

Rejection Statute Mix

BucketCases
§103 only3 (75%)
Multi-statute (no §101)1 (25%)

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
4
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.

40 h
Manual time on pending OAs
8 h
Time saved (low, 20%)
14 h
Time saved (mid, 35%)
0.3 wks
FTE-weeks freed (mid)

Top Examiners on this docket

ExaminerApps on this docketAllow rateInterview lift
KOO, BENJAMIN K 2 57.3% +49.7%
JARIWALA, CHIRAG 1 62.1% +27.5%
RADOMSKI, MARTIN ADAM 1 33.3% +45.5%

Hard Cases (1)

Multi-statute / §101-driven matters, or cases in front of an examiner with an allow rate under 30%. The top 1 ordered by deadline are shown.

App #TitleExaminerDue in
17702206 Medicament Preparation Devices, Methods, and Systems RADOMSKI, MARTIN ADAM —

Interview Candidates (4)

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 4 ordered by deadline are shown.

App #TitleExaminerDue in
17836164 Drain Electrical Devices, Methods, and Systems JARIWALA, CHIRAG —
17778316 Peritoneal Dialysis Systems, Devices, and Methods KOO, BENJAMIN K —
17702206 Medicament Preparation Devices, Methods, and Systems RADOMSKI, MARTIN ADAM —
17695176 Medicament Preparation Devices, Methods, and Systems KOO, BENJAMIN K —

Top Art Units

Art UnitApps
3783 3
3746 1

Pending Office Actions

App #TitleExaminerArt UnitStatutesStatusDue inAIFiled
17836164 Drain Electrical Devices, Methods, and Systems JARIWALA, CHIRAG 3746 §103 Non-Final OA — Pending Jun 09, 2022
17778316 Peritoneal Dialysis Systems, Devices, and Methods KOO, BENJAMIN K 3783 §103 Final Rejection — Pending May 19, 2022
17702206 Medicament Preparation Devices, Methods, and Systems RADOMSKI, MARTIN ADAM 3783 §103§112 Non-Final OA — Pending Mar 23, 2022
17695176 Medicament Preparation Devices, Methods, and Systems KOO, BENJAMIN K 3783 §103 Final Rejection — Pending Mar 15, 2022

Managing NxStage Medical Inc.'s Patent Portfolio?

IP Author helps IP teams respond to office actions faster with AI-generated responses, examiner analytics, and prosecution intelligence.

Start Free Trial

Frequently Asked Questions

How many pending USPTO office actions does NxStage Medical Inc. have?

NxStage Medical Inc. has 4 pending office actions as of October 2026, spread across 2 art units and 3 examiners.

Which USPTO examiner handles the most NxStage Medical Inc. applications?

Benjamin K Koo has the most, with 2 of NxStage Medical Inc.'s pending office actions.

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

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

Sign in with your work email

Enter your email to receive a magic link. No password needed.

Personal email addresses (Gmail, Yahoo, etc.) are not accepted.

Free tier: 3 strategy analyses per month