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:
Mar. 20, 1990
Filed:
Feb. 27, 1989
Applicant:
Inventors:
Akira Ikushima, Kawasaki, JP;
Takeyuki Sawamoto, Tokyo, JP;
Assignee:
Hoya Corporation, Shinjuku, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B44C / ; B29C / ; C03C / ; C03C / ;
U.S. Cl.
CPC ...
156644 ; 156628 ; 156643 ; 156645 ; 156654 ; 156668 ; 2504921 ; 3511 / ;
Abstract
The contact lens of the present invention is produced by a process comprising a step of irradiating a transparent polymeric material with charged particles and a step of applying an etching treatment to the resulting material to form microfine holes therein along the tracks of the charged particles.