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:
Jun. 10, 2003
Filed:
May. 22, 2001
Applicant:
Inventors:
Leland A. Hardcastle, Decatur, TX (US);
Rex G. Sheppard, Decatur, TX (US);
David F. Dingus, Decatur, TX (US);
Assignee:
Poco Graphite, Inc., Decatur, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B 3/100 ;
U.S. Cl.
CPC ...
C01B 3/100 ;
Abstract
A process for producing molded pitch based foam is shown which provides a more uniform density gradient throughout the ultimate product. The process utilizes a pressure drop during processing in order to induce foaming. By inducing foaming through process depressurization, additional viscosity manipulation can be achieved as well as improved density gradient characteristics in the ultimate product.