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. 14, 1993
Filed:
Jan. 28, 1992
Applicant:
Inventors:
Koji Onda, Gifu, JP;
Toshihisa Sakai, Gifu, JP;
Yasuhiro Yokoyama, Nagoya, JP;
Takanori Shibata, Nagoya, JP;
Yasuyuki Kato, Nagoya, JP;
Assignees:
Menicon Co., Ltd., Nagoya, JP;
Tomei Sangyo Kabushiki Kaisha, Nagoya, JP;
Primary Examiner:
Int. Cl.
CPC ...
D06P / ; D06P / ; G02C / ;
U.S. Cl.
CPC ...
8507 ; 8650 ; 8651 ; 8653 ;
Abstract
A method for tinting a water-absorptive contact lens to have a mark tinted thereon, which comprises superimposing on a water-absorptive contact lens in the dry state a screen provided with a tinting pattern corresponding to the mark to be tinted on the contact lens, applying to the contact lens through the tinting pattern of the screen a dye solution containing a vat dye and an alkaline reducing agent, followed by insolubilizing the vat dye.