Application

18951901 · HIGH DENSITY ENVIRONMENTALLY FRIENDLY POLYMER WATER-BASED DRILLING FLUID WITH RESISTANCE TO 240°C AND SATURATED SALTS, PREPARATION METHOD THEREFOR AND USE THEREOF

Filed 2024-11-19 · Granted · Patent 12269985 (2025-04-08) The official file ↗The patent and its PDF ↗ · Art unit 1759 · Examiner Alicia Bland Typical · CPC C09K 8/24 · China University of Petroleum (East China) · Calfee, Halter & Griswold LLP

Office actions

first was Notice of allowance

RCEs

no appeal

To first action

3.2 mo

to disposition 4.6 mo

Statutes raised

0 actions read

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