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. 16, 2009
Filed:
Apr. 12, 2006
David Wayne Schroeder, Winona Lake, IN (US);
Jordan H. Freedman, Fort Wayne, IN (US);
James E. Gunter, Claypool, IN (US);
Brian D. Salyer, East Warsaw, IN (US);
H. Gene Hawkins, Warsaw, IN (US);
David Wayne Schroeder, Winona Lake, IN (US);
Jordan H. Freedman, Fort Wayne, IN (US);
James E. Gunter, Claypool, IN (US);
Brian D. Salyer, East Warsaw, IN (US);
H. Gene Hawkins, Warsaw, IN (US);
Biomet Manufacturing Corp., Warsaw, IN (US);
Abstract
Solid-state deformation processing of crosslinked high molecular weight polymers such as UHMWPE, for example by extrusion below the melt transition, produces materials with a desirable combination of physical and chemical properties. Crosslinked bulk materials are heated to a compression deformable temperature, and pressure is applied to change a transverse dimension of the material. After cooling and stress relieving, a treated bulk material is obtained that has enhanced tensile strength in the axial direction orthogonal to the dimension change. In preferred embodiments, medical implant bearing materials are machined from the treated bulk material with the in vivo load bearing axis substantially parallel or coincident with the axial direction of the treated bulk material.