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:
Sep. 16, 1980
Filed:
Sep. 11, 1978
Applicant:
Inventors:
Assignee:
Ciba-Geigy Corporation, Ardsley, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
D06P / ; C07D / ; C07D / ;
U.S. Cl.
CPC ...
8648 ; 25230132 ; 427158 ; 260 / ; 260 / ; 260 4221 ; 260 4243 ; 260 4246 ; 26034671 ; 8641 ;
Abstract
Benzodifuranes of the formula ##STR1## wherein R represents hydrogen, alkyl or halogen, each of R.sub.1, R.sub.2 and R.sub.3 represents hydrogen or different non-chromophoric substituents, with the proviso that at least one of the symbols R, R.sub.1, R.sub.2 or R.sub.3 does not represent hydrogen, processes for their production and the use thereof for whitening organic material of high molecular weight, especially polyester, polyvinyl chloride or polystyrene.