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:
Feb. 03, 1998
Filed:
May. 16, 1996
Clinton O Fruitman, Chandler, AZ (US);
Andrew Gluck, Tucson, AZ (US);
John L Lombardi, Tucson, AZ (US);
Kevin L Stuffle, Tucson, AZ (US);
Speedfam Corporation, Chandler, AZ (US);
Abstract
The present invention relates generally to abrasive stone pads for use in processing workpiece surfaces. The abrasive stones generally are produced by combining a phenolic resin mixture with a diluent and then injecting microballoon structures into the resin/diluent mixture to create a porous solution. The diluent is initially ball milled with an abrasive in a tumbler to eliminate the agglomerates and is then added to a resin monomer. A suitable catalyst is added to the mixture to create a chemical reaction, further increasing the porocity of the substance. The mixture is poured into molds and with through a filter or frit plate to remove excess resin and diluent. Finally, the mixture is cured, creating abrasive stones having a uniform surface and bulk structure with a uniform hardness, suitable for workpiece grinding.