Prosecution Insights
Last updated: October 02, 2026

Examiner: CHIU, TAK LIANG

Tech Center 1700 • Art Units: 1771 1772 1777 1779

This examiner grants 49% of resolved cases

Analysis

Tak Liang Chiu examines applications in Tech Center 1700 and Art Unit 1771. The examiner has 43 resolved cases with an allowance rate of 48.8%. This rate suggests a competitive prosecution environment where slightly less than half of the applications result in a patent grant. The median days to allowance is 1285, which informs applicants about the expected duration of the process when pursuing a successful outcome in this specific art unit.

The interview lift of 20.7% is a significant metric for practitioners to consider. This lift indicates that the probability of allowance increases by 20.7% when an interview is conducted. For cases that might otherwise struggle under the 48.8% baseline, an interview provides a meaningful opportunity to address examiner concerns and advance the application. This suggests that the examiner is receptive to direct verbal communication.

Based on the 43 resolved cases, the data highlights a clear benefit to direct engagement. The 1285 median days to allowance reflects the time investment required, while the 20.7% interview lift offers a tactical advantage. Practitioners working in Tech Center 1700 should weigh the 48.8% allowance rate against the potential gains from interviewing to optimize their prosecution strategy.

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

Performance Statistics

48.8%
Allow Rate
-16.2% vs TC avg
74
Total Applications
+20.7%
Interview Lift
1285
Avg Prosecution Days
Based on 43 resolved cases, 2023–2026

Rejection Statute Breakdown

1.2%
§101 Eligibility
12.4%
§102 Novelty
50.6%
§103 Obviousness
33.1%
§112 Clarity

Currently Pending Office Actions

App #TitleStatusAssignee
17609072 COMPOSITION FOR FORMING SEPARATION MEMBRANE ACTIVE LAYER, METHOD FOR PRODUCING SEPARATION MEMBRANE, SEPARATION MEMBRANE, AND WATER TREATMENT MODULE Non-Final OA LG CHEM, LTD.
18553957 TETRABLOCK COPOLYMERS AND ARTICLES MADE THEREFROM Non-Final OA Solventum Intellectual Properties Company
17924564 POROUS MEMBRANE LAMINATE, FILTER ELEMENT AND METHOD OF MANUFACTURING POROUS MEMBRANE LAMINATE Final Rejection SUMITOMO ELECTRIC INDUSTRIES, LTD.
17914304 A SEMI-PERMEABLE MEMBRANE Final Rejection National University of Singapore
18268454 POLYFLUORENE-BASED ANION EXCHANGE COMPOSITE MEMBRANE AND METHOD FOR PREPARING SAME Final Rejection IUCF-HYU (INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY)
17777639 Macromolecular compositions for binding small molecules Non-Final OA UMC Utrecht Holding B.V.
18719692 PROCESS FOR MAKING A FILTRATION AND/OR DIFFUSION DEVICE Non-Final OA GAMBRO LUNDIA AB
17629582 MODIFIED ZEOLITE FOR HEAVY METAL REMOVAL Final Rejection OMYA INTERNATIONAL AG
18193517 NANOPORE DEVICES INCLUDING BARRIERS USING POLYMERS WITH END GROUPS, AND METHODS OF MAKING THE SAME Final Rejection Illumina, Inc.
17599683 SYSTEM FOR REDUCING TOTAL CARBON CONSUMPTION IN THE GENERATION OF LOW CHEMICAL OXYGEN DEMAND TREATED STREAMS Non-Final OA LUMMUS TECHNOLOGY LLC
18025272 WATER TREATMENT SYSTEM, PURE WATER PRODUCTION METHOD, AND WATER TREATMENT METHOD Final Rejection ORGANO CORPORATION
18758505 INLINE LIQUID-DEGASSER WITH LOOPED FIBERS Non-Final OA AMD Design, LLC
18431505 Porous Polymer Product For Removing Contaminants From A Fluid Stream Non-Final OA Celanese International Corporation
18267974 AUTOMATIC MONITORING SYSTEM FOR SOLUTION-PHASE SYNTHESIS Final Rejection GlycodePharma Co., Ltd.

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