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:
Dec. 05, 1989
Filed:
Oct. 17, 1986
Mark A Spak, Edison, NJ (US);
Hoechst Celanese Corporation, Somerville, NJ (US);
Abstract
The invention provides a method for producing a photographic element which comprises coating a substrate with a positive working photosensitive composition which composition comprises an aqueous alkali soluble resin, a quinone diazide photosensitizer and a solvent composition, heat treating said coated substrate at a temperature of from about 20.degree. C. to about 100.degree. C. until substantially all of said solvent composition is removed; imagewise exposing said photosensitive composition to actinic radiation; baking said coated substrate at a temperature of from about 120.degree. C. to about 160.degree. C. for from about 15 seconds to about 90 seconds; and removing the exposed non-image areas of said composition with a suitable developer.