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:
Apr. 08, 1986
Filed:
Aug. 14, 1985
Applicant:
Inventors:
Assignee:
Montedison S.p.A., Milan, IT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B05D / ;
U.S. Cl.
CPC ...
427162 ; 427163 ; 427164 ; 4273722 ; 4273855 ; 427387 ; 4273935 ; 4274301 ;
Abstract
Light guide articles made of glassy polymers are provided with a gradually varying refractive index by immersion in a solution of a substance having a different refractive index and which swells the glassy polymer under the immersion conditions and thereafter heating the article under conditions to remove the solvent and leave the substance of different refractive index under the surface of the article.