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:
Sep. 03, 1991
Filed:
Oct. 21, 1988
Eckehard Saverin, Osnabruck, DE;
Hans-Udo Tyrakowski, Hasbergen, DE;
Felix Schoeller jr. GmbH & Co. KG, Osnabruck, DE;
Abstract
A photographic support material is disclosed for light sensitive coatings in the form of a plastic coated paper or a plastic foil whose backside has a coating allowing writability. The back coating comprises a terpolymer latex of styrene-butadiene-methacrylate, a hard silicic acid, and an aluminium modified colloidal silicic acid sol. The coating may also include an aqueous solution of a salt of an organic polyacid. The quantities of the additives used result in optimal characteristics of printability, writability using various pens and lead pencils, minimal soiling in old developing baths, minimal coloring in developing solutions, good tape adhesion and, when required, good antistatic characteristics.