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. 20, 1988
Filed:
May. 11, 1987
Applicant:
Inventors:
Andrew B Malizio, Shelby, AL (US);
Robert W Jennings, Shelby, AL (US);
Assignee:
United States Pipe and Foundry Company, Birmingham, AL (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B22D / ;
U.S. Cl.
CPC ...
164 581 ; 164114 ; 164118 ;
Abstract
A heavy wall monolithic iron pipe comprises nodular graphite in the outer portion of its wall and flake or quasi-flake graphite in the inner portion of its wall and a method for making the pipe. The central portion of the wall of the pipe may be a combination of nodular graphite and flake or quasi-flake graphite.