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. 10, 1976
Filed:
Nov. 18, 1974
Applicant:
Inventors:
Heinz Balli, Riehen, CH;
Albert Egger, Allschwil, CH;
Assignee:
Ciba-Geigy Corporation, Ardsley, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
260335 ; 2603 / ; 260328 ; 2323 / ; 2323 / ; 73356 ; 1161 / ;
Abstract
The invention relates to specific naphthofuranes which are useful as cryochromic substances e.g. for measuring the temperature, pH value or radiation field.