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:
Apr. 29, 2003
Filed:
Feb. 09, 2001
Applicant:
Inventors:
David L. Snyder, Princeton, TX (US);
Karl J. Urquhart, McKinney, TX (US);
Richard Swindell, Bonham, TX (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01F 1/502 ; B24B 5/702 ;
U.S. Cl.
CPC ...
B01F 1/502 ; B24B 5/702 ;
Abstract
On-site blending and distribution of oxide abrasives with other constituents as used in semiconductor applications. Constituent blending is accomplished through weighing components individually into a blending tank. Some components may be added by injection or weight. Alternatively blends can be made to varying concentrations by passing the blended oxide solution in a closed circulation loop through a calibrated encapsulated torroid coil to measure electrical conductivity. The resulting conductivity output may be used to add one or more component.