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:
Jun. 28, 1983
Filed:
Oct. 06, 1981
Mitsui Petrochemical Industries Ltd., Tokyo, JP;
Abstract
A monoaxially or biaxially stretched film structure, or a heat-set structure thereof, of an unstretched film of an aromatic polyester of the poly-1,3-phenylene terephthalate type, said aromatic polyester having an intrinsic viscosity, determined in p-chlorophenol at 50.degree. C., of 0.4 to 2.0 and being composed of [A] polybasic carboxylic acid component units consisting of terephthalic acid units (a.sub.1) and units (a.sub.2) of a polybasic carboxylic acid other than terephthalic acid, the proportion of the units (a.sub.2) being up to 25 mole % based on the units (a.sub.1) and units (a.sub.2) combined, and [B] polyol component units consisting of resorcinol units (b.sub.1) and units (b.sub.2) of a polyol other than resorcinol, the proportion of the units (b.sub.2) being up to 25 mole % based on the units (b.sub.1) and (b.sub.2) combined.