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:
May. 01, 2012
Filed:
Feb. 02, 2005
Masahiko Samukawa, Tokyo, JP;
Norihisa Tanaka, Tokyo, JP;
Masahiko Samukawa, Tokyo, JP;
Norihisa Tanaka, Tokyo, JP;
Hoya Corporation, Tokyo, JP;
Abstract
To manufacture a photochromic lens by uniformly applying a coating liquid having a photochromic function without leaving an uncoated area, with a minimum necessary coating amount. There is provided a manufacturing method of the photochromic lens for dripping and applying a coating liquidhaving the photochromic function onto a coating surfaceof a spectacle lens, while rotating a spectacle lens, and forming a photochromic film having the photochromic function on the coating surface, comprising dripping (ring-shaped drip part) the coating liquid in a ring shape in the vicinity of an outer circumference on the coating surface of the spectacle lens, and thereafter dripping (spiral-shaped drip part) the coating liquid in a spiral shape toward a geometrical center or an optical center of the spectacle lens from the vicinity of the outer circumference, wherein the coating surface has a convex curved shape, and a viscosity of the coating liquid is 25 to 500 cps at 25° C.