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:
Jun. 04, 1996
Filed:
Mar. 10, 1994
Jeffrey M Kingsbury, Cotati, CA (US);
Sola International Inc., Menlo Park, CA (US);
Abstract
A lens has two or more layered sections of thermoplastic material, and a substantially homogenous formation in which at least one of the layered sections has an active photochromic material present. The article is made by: forming a mould cavity from first and second mould halves; loading the mould cavity with a first thermoplastic material; curing or partially curing that material; changing the second mould half to define a subsequent mould cavity in which the cured or partially cured material is present; loading the subsequent mould cavity with a subsequent thermoplastic material; and completing any uncompleted curing of the first and subsequent thermoplastic materials. At least one of the thermoplastic materials is loaded with an active photochromic material.