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:
Dec. 01, 1992
Filed:
Sep. 14, 1989
Applicant:
Inventors:
Kenneth W Babcock, Pampa, TX (US);
Jay J Zimmer, Brighton, AU;
Assignee:
Cabot Corporation, Waltham, MA (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01B / ; C08K / ;
U.S. Cl.
CPC ...
524495 ; 423445 ;
Abstract
Carbon blacks having a nitrogen surface area (N.sub.2 SA) of from at least 180 m.sup.2 /g to about 250 m.sup.2 /g, a ratio of nitrogen surface area/iodine adsorption number (N.sub.2 SA/I.sub.2 No.) of from about 0.90 to about 1.05, a ratio of .DELTA.D 50/Dmode of from about 0.67 to about 0.81, a DBP (dibutyl phthalate number) of from about 115 cc/100 g to about 135 cc/100 g and a .DELTA.DBP [.DELTA.DBP=DBP-CDPB (Crushed DBP)] less than or equal to 20 cc/100 g, and rubber compositions in which the carbon blacks are incorporated.