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:
Nov. 30, 1993
Filed:
Feb. 07, 1992
Applicant:
Inventor:
William R Roder, Indianapolis, IN (US);
Assignee:
Reilly Industries, Inc., Indianapolis, IN (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C10C / ; C10C / ; C10C / ;
U.S. Cl.
CPC ...
208 22 ; 208 42 ; 208 44 ; 201 20 ;
Abstract
Described is a preferred process for obtaining an increased pitch yield from the distillation of crude coal tar material. The process includes treating a crude coal tar material by reaction with formaldehyde, followed by distillation of the coal tar to afford a yield of coal tar pitch which is significantly increased over that obtained without the formaldehyde treatment.