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:
Oct. 13, 1987
Filed:
Dec. 18, 1985
Frederick H Howell, Atherton, GB;
Ciba-Geigy Corporation, Ardsley, NY (US);
Abstract
New compounds having the formula I are described: ##STR1## wherein R and R.sup.1, independently are H, halogen, a straight- or branched-chain alkyl having 1 to 8 carbon atoms or a residue having the formula II: ##STR2## wherein R.sup.2 and R.sup.3 are the same or different and each is H or straight- or branched-chain alkyl having 1 to 4 carbon atoms and R.sup.4 is H, halogen or straight- or branched-chain alkyl having 1 to 4 carbon atoms; provided that at least one of R and R.sup.1 is a residue of formula II, and that when R is a residue of formula II wherein R.sup.2, R.sup.3, and R.sup.4 and H, R.sup.1 may not be ethyl or n-propyl. Processes for producing the new compounds are also disclosed. Compounds of formula I are useful as intermediates for valuable dispersion dyestuffs.