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:
May. 04, 1976
Filed:
Feb. 28, 1975
Applicant:
Inventors:
Gunter Osswald, Hanau, DT;
Hans Graf, Rodenbach, DT;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09C / ;
U.S. Cl.
CPC ...
106307 ; 1063 / ; 1063 / ; 428411 ; 260 4216 ; 260 / ; 260 342 ; 260 4254 ;
Abstract
Pigment preparations containing carbon black, blue pigment and a wetting agent are prepared having an intimate inseparable mixture based on the total amount of pigment of 60-95 wt. % carbon black pigment and 40 to 5 wt. % blue pigment and based on 100 parts by weight of pigment, 0.5 to 3 parts weight of polyvinylpyrrolidone and 4 to 10 parts by weight of a cation active invert soap. The products are useful for pigmenting waxless carbon papers, typewriter tapes, printing inks and synthetic resins.