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:
Nov. 12, 2002
Filed:
Sep. 15, 2000
Robert G. Swisher, Pittsburgh, PA (US);
Alan E. Wang, Gibsonia, PA (US);
PPG Industries Ohio, Inc., Cleveland, OH (US);
Abstract
A polishing pad is described as comprising, (a) particulate polymer selected from particulate thermoplastic polymer (e.g., particulate thermoplastic polyurethane), particulate crosslinked polymer (e.g., particulate crosslinked polyurethane and/or particulate crosslinked polyepoxide) and mixtures thereof; and (b) crosslinked organic polymer binder (e.g., crosslinked polyurethane binder and/or crosslinked polyepoxide binder), which binds the particulate polymer together. The particulate polymer and crosslinked organic polymer binder are distributed substantially uniformly throughout the polishing pad, and the pad has a percent pore volume of from 2 percent by volume to 50 percent by volume, based on the total volume of said polishing pad. Polishing pad assemblies are also described.