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:
May. 10, 1988
Filed:
Jan. 20, 1987
Piran Sioshansi, Bedford, MA (US);
Ward D Halverson, Cambridge, MA (US);
Spire Corporation, Bedford, MA (US);
Abstract
A metal alloy with a treated surface and the process of effecting the treated surface are disclosed whereby its ion release under static, stress and crevice corrosion and corrosive wear conditions is reduced. The metal alloy preferably is an ASTM F-75 Co-Cr-Mo alloy. The preferred process includes providing a workpiece formed of such a metal alloy with a coating of biologically compatible elements, such as a noble metal and then exposing the thus coated surface thereof to bombardment by an ion beam, whereby a plurality of noble metal atoms, together with a plurality of ions from the beam, are driven into the surface of the workpiece a certain distance. Another preferred process includes the direct ion implantation of a workpiece with biocompatible elements, such as nitrogen, tantalum and inert gas ions. Preferably, such a workpiece finds application as an orthopaedic implant.