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:
Jan. 10, 1984
Filed:
Nov. 25, 1981
Applicant:
Inventors:
Lawrence J White, San Jose, CA (US);
Tamar G Gen, Palo Alto, CA (US);
Assignee:
Raychem Corporation, Menlo Park, CA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C09D / ; G01K / ; G01K / ; F16L / ; F16L / ; F16L / ; F16L / ;
U.S. Cl.
CPC ...
285381 ; 29447 ; 29450 ; 29516 ; 2952 / ; 116206 ; 116207 ; 116216 ; 138 99 ; 285256 ; 285417 ; 285422 ; 374141 ; 374161 ; 374162 ; 403273 ; 403278 ; 436-2 ; 436147 ;
Abstract
This invention provides novel thermochromic compositions which exhibit distinct color changes at temperatures in the range of about 165.degree. C. to about 240.degree. C. The compositions comprise basic copper carbonate and a sulfur compound. Paint formulations containing these novel thermochromic compositions or complexes of copper and sulfur-containing organic acids are also provided. The compositions are useful with heat-recoverable memory metal couplings to prevent overheating of the couplings during installation.