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:
Inventors:
King L Mills, Bartlesville, OK (US);
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 carbon black is produced by severely aftertreatng a carbon black-containing smoke inside of the carbon black reactor to result in a carbon black with a photelometer of 100% and a pitting degree (nitrogen surface area minus CTAB surface area) of about 7 square meters per gram or more, oxidizing this carbon black and thereafter high temperature drying wet pellets made from this carbon black at a temperature between about 500.degree. and 600.degree. F.