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:
Feb. 13, 1979
Filed:
Nov. 12, 1975
Applicant:
Inventors:
Glenn L Baughman, Wadsworth, OH (US);
Henry C Stevens, Akron, OH (US);
Assignee:
PPG Industries, Inc., Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08L / ; G02B / ;
U.S. Cl.
CPC ...
260871 ; 260872 ; 351159 ;
Abstract
Compositions of bis (allyl carbonate) of linear or branched alkylene glycols, unsaturated polyester resin, and unsaturated monomer, e.g., unsaturated esters and styrene, and polymerizates produced from such compositions are described. A particular embodiment described is the composition comprising 40 weight percent diethylene glycol bis (allyl carbonate), 50 weight percent poly(ethylene maleate adipate) and 10 weight percent of dimethyl maleate, and polymerizates prepared from such composition. Such polymerizates have good optical properties and are useful as lenses, e.g., ophthalmic lenses.