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:
Jul. 04, 1978
Filed:
Sep. 23, 1977
Giuseppe Ribaldone, Gallarate (Varese), IT;
Renato Grecu, Cameri (Novara), IT;
Camillo Paffoni, Pogno (Novara), IT;
Giuseppe Sironi, Novara, IT;
Montedison S.p.A., Milan, IT;
Abstract
The present invention relates to a new class of compounds belonging to the anthraquinone series, having the general formula: ##STR1## wherein R, R', R', R'', R' are indifferently H or Chlorine, ##STR2## Such compounds exhibit a color varying from yellow to violet depending on the nature and position of substituents R, R', R', R'', R'.sup.v and, in virtue of their excellent stability characteristics, they are particularly useful as pigments and vat dyes. This invention relates furthermore to the preparation of compounds having general formula (I) and to the utilization thereof, particularly in the following applications: