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:
Aug. 29, 1978
Filed:
Jan. 30, 1976
Morgan E Gager, Warwick, RI (US);
Trans World Technology Laboratories, Inc. (TWT Labs Inc.), Fiskeville, RI (US);
Abstract
An acid donor sheet for use in thermographic imaging which comprises a substrate sheet material having a coating comprising an organic acid which is volatilizable at thermographic imaging temperatures, an additive consisting essentially of a fatty acid having from 10 to 26 carbon atoms or a metal salt thereof, and a polymeric binder compatible with said volatilizable acid. A preferred composition is salicylic acid, lauric acid and nitrocellulose on a polyester base. The acid donor sheet of the invention is particularly useful in providing color projection transparencies having improved image density, readability, and permanence.