The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 22, 1977
Filed:
Aug. 03, 1973
William N Knopka, Wilmington, DE (US);
Avtex Fibers Inc., Valley Forge, PA (US);
Abstract
A flame-retardant filament-forming copolyester of at least 75 mol % of ethylene-2,6-naphthalene dicarboxylate units and at least 3 mol % up to 25 mol % of randomly copolymerized esters units having bromine or chlorine chemically united with either the diacid residue or both the diacid residue and the diol residue of said ester units. In addition, fibers of the above flame-retardant copolyester resin and flame-retardant cellulosic fibers are blended together to provide flame-retardant yarns and fabrics of excellent physical properties.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile