Prosecution Insights
Last updated: October 02, 2026

Examiner: TIETJEN, MARINA ANNETTE

Tech Center 3700 • Art Units: 3725 3733 3753 3799

This examiner grants 75% of resolved cases

Analysis

Marina Annette Tietjen is an examiner in Tech Center 3700 and Art Unit 3725. The examiner has managed 976 resolved cases, maintaining an allowance rate of 75.0%. The median days to allowance is 954, which is a timeline for prosecution. These metrics suggest a predictable environment for patent applicants.

The interview lift is 20.8%, providing an increase over the 75.0% baseline allowance rate. This indicates that while the written record is often sufficient for success, an interview can be a tool for resolving outstanding issues. For practitioners, the 954-day median pendency is an advantage, as it shows the examiner moves cases toward resolution. With 976 resolved cases, the data is statistically strong. Applicants in Art Unit 3725 can rely on the 75.0% allowance rate as an expectation. The 20.8% lift suggests that the examiner is receptive to dialogue, making an interview a recommended strategy for securing a grant.

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

Performance Statistics

75.0%
Allow Rate
+5.0% vs TC avg
1,000
Total Applications
+20.8%
Interview Lift
954
Avg Prosecution Days
Based on 976 resolved cases, 2023–2026

Rejection Statute Breakdown

0.3%
§101 Eligibility
28.4%
§102 Novelty
45.1%
§103 Obviousness
24.7%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
19238552 COOLANT CONTROL VALVE Non-Final OA Schaeffler Technologies AG & Co. KG
18834823 WATER MANAGEMENT Non-Final OA Resideo USA LLC
18990230 ELECTROMECHANICAL CONNECTION DEVICE AND DIRECTIONAL CONTROL VALVE EQUIPPED THEREWITH Non-Final OA Festo SE & Co. KG

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