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:
Jan. 06, 1981
Filed:
Apr. 20, 1979
Applicant:
Inventor:
Harold R Hunt, Bartlesville, OK (US);
Assignee:
Phillips Petroleum Company, Bartlesville, OK (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01J / ;
U.S. Cl.
CPC ...
425222 ; 264117 ;
Abstract
A carbon black pellet formed by the pelleting of flocculent carbon black. An outer portion of the pellet contains antioxidant to prevent oxidation of the pellet during drying. The antioxidant is contained in a shell having a thickness sufficient to prevent oxidation of the pellet instead of being distributed throughout the thickness of the pellet. The antioxidant can be admixed with additional carbon black and the admixture used to form the outer layer of a layered pellet or the antioxidant can be mixed with the pelleting liquid used to aid in pelleting the additional carbon black used to form an outer layer of a layered pellet.