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. 30, 1980
Filed:
Apr. 30, 1979
Kwok C Yee, Randolph, NJ (US);
Anthony F Preziosi, Ledgewood, NJ (US);
Gordhanbhai N Patel, Morris Plains, NJ (US);
Ronald R Chance, Morris Plains, NJ (US);
Granville G Miller, Morristown, NJ (US);
Ray H Baughman, Morris Plains, NJ (US);
Allied Chemical Corporation, Morris Township, Morris County, NJ (US);
Abstract
Certain polyacetylenes exhibit reversible color changes at transition temperatures in the range -180.degree. to 220.degree. C., wherein the thermochromic cycles can be repeated many times with no apparent degradation and little change in spectroscopic properties. These thermochromic polyacetylenes are useful in temperature-indicator and indicia-display device applications. A process for laser-beam recording of images is described employing a thermochromic polyacetylene, in which the hysteresis properties of the polyacetylene can be suitably altered allowing for selectively storing or erasing the formed image.