USPTO trademark record

DUO-AIR

Dead mark · Owner DUO-FLEX CORPORATION · Classes 19

Mark details

Owner: DUO-FLEX CORPORATION
Serial number: 72383875
Registration number: 0932463
Status: EXPIRED (dead)
Classes: 19 (Building materials)
Filed: 1971-02-16
Registered: 1972-04-18
Goods / services: STRUCTURAL SUSPENDED CEILING SYSTEMS FOR DISTRIBUTION OF AIR THROUGH SUSPENDED CEILING MEMBERS

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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