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. 09, 1992
Filed:
Oct. 30, 1989
Eric W Bouldin, Atherton, CA (US);
Brad W Dreisbach, Sunnyvale, CA (US);
Drexler Technology Corporation, Mountain View, CA (US);
Abstract
A system and method of creating transmissive images in a developed photographic film is disclosed. A light-sensitive silver halide emulsion is developed to form an opaque surface layer of fine silver grains with a clear underlayer supported on a transparent substrate. Transmissive images are created in the opaque surface layer by selectively applying an oxidizing solution which oxidizes the silver grains to silver ions which are poor absorbers of light. The underlayer absorbs excess oxidizing solution with little or no swelling. The oxidizing solution may be dispersed by a modified ink-jet printer. The imaged film has high contrast and can be directly used without further processing in color printing plate making systems and other applications requiring a transmissive film or mask.