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. 04, 2001
Filed:
Mar. 22, 2001
Lee Melbourne Cook, Steelville, PA (US);
David B. James, Newark, DE (US);
Charles William Jenkins, Newark, DE (US);
Heinz F. Reinhardt, Chadds Ford, PA (US);
John V. H. Roberts, Newark, DE (US);
Raj Raghav Pillai, Newark, DE (US);
Rodel Holdings, Inc., Wilmington, DE (US);
Abstract
A polishing pad having a uniform, continuously interconnected porous surface. The pad is produced by pressure sintering powder compacts of thermoplastic polymer at a temperature above the glass transition temperature but not exceeding the melting point of the polymer. The sintering process is conducted at a pressure in excess of 100 psi and in a mold having the desired final pad dimensions. In a preferred version, a mixture of two polymer powders is used, where one polymer has a lower melting point than the other.