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. 25, 1991
Filed:
Jan. 02, 1990
Applicant:
Inventors:
Richard P Vierod, Branford, CT (US);
Harvey P Cheskis, North Haven, CT (US);
Derek E Tyler, Cheshire, CT (US);
Assignee:
Olin Corporation, Cheshire, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22C / ; C22F / ;
U.S. Cl.
CPC ...
148-2 ; 75652 ; 148434 ; 148 / ; 420477 ; 420496 ;
Abstract
A method of producing a grain refined copper base alloy containing iron in the amount of less than 2.3% by weight and which is cast into an ingot by conventional direct chill casting. Calcium is added to the melt before casting, preferably in the form of a copper-clad or iron-clad calcium feedwire.