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:
Sep. 25, 1990
Filed:
Oct. 10, 1989
Applicant:
Inventors:
Claude Bonnebat, Pontault-Combault, FR;
Jean-Pierre Quentin, Lyon, FR;
Alain Morin, Villeurbanne, FR;
Assignee:
Rhone-Poulenc Chimie, Courbevoie, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
428 64 ; 428 65 ; 428156 ; 428480 ; 430271 ;
Abstract
Rigid, dimensionally stable, essentially circular and planar, axially injection-molded disc members, well adapted as support substrates for radiation sensitive layers for optical discs, e.g., laser discs, comprise radially molecularly oriented thermotropic polymers and such disc members have a radiation-sensitive microrelief pattern on at least one of the face surfaces thereof.