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. 21, 1978
Filed:
Apr. 30, 1976
Applicant:
Inventor:
Paul H Johnson, Bartlesville, OK (US);
Assignee:
Phillips Petroleum Company, Bartlesville, OK (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08K / ;
U.S. Cl.
CPC ...
260 4247 ; 260 4248 ; 423445 ; 423450 ; 423460 ;
Abstract
A non-carcinogenic large particle carbon black both produced by severely aftertreating a carbon black-containing smoke to result in a carbon black with a photelometer of 100% and a pitting value (nitrogen surface area minus CTAB surface area) of about 0.2 m.sup.2 /g or more to 7 m.sup.2 /g or more for a carbon black of 30 m.sup.2 /g to 80 m.sup.2 /g CTAB surface area, oxidizing the black as well as by high temperature drying the wet pelleted carbon black at a temperature of about 500.degree. to 600.degree. F. The CTAB surface area of the carbon black is less than 80 m.sup.2 /g and preferably about 30 to 60 m.sup.2 /g.