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:
Jan. 28, 1986
Filed:
Jan. 25, 1985
Applicant:
Inventors:
Keiji Ohtaka, Tokyo, JP;
Takashi Suzuki, Yokohama, JP;
Kiyoshi Iizuka, Yokohama, JP;
Hidemasa Mizutani, Kawasaki, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03F / ; G03F / ; G02B / ; G02B / ;
U.S. Cl.
CPC ...
430-4 ; 264-14 ; 264-25 ; 427135 ; 430321 ; 430324 ; 350417 ; 350431 ;
Abstract
A diffusing plate having a smooth rough surface is obtained by recording on a photosensitive material the image of a mask having a regular fine pattern thereon, treating the photosensitive material to thereby obtain a photosensitive material having smooth roughness, transferring the smooth roughness of the treated photosensitive material to a metal mold, and embossing plastics on the metal mold.