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:
Apr. 15, 1980
Filed:
Oct. 26, 1976
Applicant:
Inventors:
Phillip E Sokol, Rockville, MD (US);
Robert F Farmer, Gaithersburg, MD (US);
Assignee:
The Gillette Company, Boston, MA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B32D / ;
U.S. Cl.
CPC ...
427140 ; 427145 ; 427261 ;
Abstract
This invention relates to materials and methods used in informational, testing, educational, amusement and other paper-based feedback systems embodying invisible images comprising a color-forming reactant material which can be rendered temporarily visible by the application of a coreactant. The systems may also include visible printed images and are suitable for multiple reuse.
Sokol, Phillip. (1980). Latent image printing and development (U.S. Patent No. 4198445). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4198445
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile