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. 15, 1991
Filed:
Apr. 08, 1987
Applicant:
Inventors:
Noriyuki Nose, Sagamihara, JP;
Toshiyuki Nakajima, Atsugi, JP;
Eigo Kawakami, Atsugi, JP;
Takeshi Baba, Atsugi, JP;
Nobuo Kushibiki, Ebina, JP;
Masakazu Matsugu, Atsugi, JP;
Yukichi Niwa, Atsugi, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29D / ;
U.S. Cl.
CPC ...
264-17 ; 264-11 ; 264-23 ; 264101 ; 264316 ; 264335 ; 425437 ; 425808 ;
Abstract
A process for producing an optical element wherein an optical molding is formed by using a mold and thereafter released from the mold by supplying a gas to the boundary between the mold surface and the optical molding. In the process, no localized external force is applied to the optical molding during the release thereof, and therefore undesirable deformation or flaws of the optical molding are not caused.