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. 24, 1977
Filed:
Mar. 12, 1975
Thomas P Seward, III, Corning, NY (US);
Corning Glass Works, Corning, NY (US);
Abstract
A method and system for processing a photographic negative to obtain photographic prints exhibiting enhanced contrast therefrom are described. A sheet of darkened optically bleachable photochromic glass, positioned between the negative and a selected photographic printing medium, is selectively bleached by light passing through the negative to form an image of the negative in the glass. Light of a wavelength effective to activate the photographic printing medium is then passed through the photographic negative and selectively bleached photochromic glass and focused to provide an enhanced contrast image of the photographic negative on the printing medium. A photographic print of enhanced contrast is thus produced.