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. 23, 1992
Filed:
Mar. 15, 1990
George Hodgins, Granby, MA (US);
Marie B Ray, Ware, MA (US);
Graphics Technology International Inc., South Hadley, MA (US);
Abstract
It surprisingly has been found that a protective coating composition for diazo-containing materials can be prepared from a cellulose ester and microcrystalline silica. The coating compositions of the invention provide protection for diazo-containing materials from physical and chemical damage. In particular, the protective coating compositions of the invention protect the diazo-containing materials from abrasion. The invention further relates to a method for providing a protective coating on a diazo phototool comprising coating at least the surface of the diazo phototool containing diazo material with a composition comprising a cellulose ester and microcrystalline silica.