USPTO trademark record

COSL

Live registered mark · Owner China Oilfield Services Limited · Classes 1, 7, 37, 39, 42

Mark details

Owner: China Oilfield Services Limited
Serial number: 79108793
Registration number: 4284399
Status: SECTION 71 ACCEPTED
Classes: 1 (Chemicals), 7 (Machines), 37 (Construction / repair), 39 (Transport / travel), 42 (Software / tech services (SaaS, design, hosting))
Filed: 2011-12-22
Registered: 2013-02-05
Goods / services: Radioactive elements for scientific purposes; chemical additives for drilling muds; drilling muds for use in oil and gas wells; chemical reagents for non-medical purposes; chemical preparations for a…

Register data as of 2026-11-08. Records can trail live filings — check the official USPTO search for the latest status before filing.

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