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. 28, 1997
Filed:
Nov. 15, 1994
Applicant:
Inventors:
Roger P Barnes, Arvada, CO (US);
Jonathan A Johnston, Northglenn, CO (US);
Assignee:
The Gates Corporation, Denver, CO (US);
Primary Examiner:
Int. Cl.
CPC ...
B29B / ;
U.S. Cl.
CPC ...
366 766 ;
Abstract
A twin screw extruder for mixing carbon black with rubber and with a first mixing zone with screw elements for heating rubber to about 130.degree.-220.degree. C., and a second port for adding carbon black and a third port for adding oil.