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. 24, 1993
Filed:
Feb. 05, 1991
Applicant:
Inventors:
Gerardus C Vercoulen, EA Velden, NL;
Ronald Groothuijse, SC Sevenum, NL;
Assignee:
Oce-Nederland B.V., CC Venlo, NL;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01G / ;
U.S. Cl.
CPC ...
423618 ; 423265 ; 252518 ;
Abstract
A fluorine-doped tin oxide powder is prepared by combining a solution of a stannic salt with a solution of a fluoride, separating the tin hydroxide from the liquid and drying it at a temperature not exceeding about room temperature and heating the dried product to at least 500.degree. C., until the fluorine content is less than 10% and preferably is between 1 and 5% by weight. The fluorine-doped tin oxide powder of the invention can be used for the manufacture of electrically conductive toner powder.