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:
Feb. 17, 1981
Filed:
Oct. 04, 1979
Luigi Balducci, Alessandria, IT;
Massimo Rustioni, Alessandria, IT;
Montedison S.p.A., Milan, IT;
Abstract
New greenish-yellow pigments based on BiVO.sub.4 are disclosed. The pigments consist of the product obtained by the calcination, in the presence of air, of a mixture of BiPO.sub.4, V.sub.2 O.sub.5 and an oxide MeO, in which Me is Ca, Ba, Mg or Zn, said calcining being conducted at a temperature of between 500.degree. and 800.degree. C. when Me is Ca, Ba or Mg; and between 500.degree. and 700.degree. C. when Me is Zn, the calcination being then followed by a slow cooling down and by wet grinding. These pigments show a molar ratio Bi.sub.2 O.sub.3 /P.sub.2 O.sub.5 equal to 1 while their molar ratios Bi.sub.2 O.sub.3 /V.sub.2 O.sub.5 are within given ranges, which depend on the nature of Me.