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. 10, 2002
Filed:
Mar. 13, 2001
Applicant:
Inventors:
Craig A. Perman, Woodbury, MN (US);
Taib K. Ansera, St. Paul, MN (US);
Eric E. Wisted, Apple Valley, MN (US);
Michael R. Berrigan, Oakdale, MN (US);
Jason R. Jacobson, Cottage Cove, MN (US);
Glen H. Bayer, Jr., Cottage Grove, MN (US);
Assignee:
3M Innovative Properties Company, St. Paul, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 1/18 ;
U.S. Cl.
CPC ...
G01N 1/18 ;
Abstract
This invention provides a one-piece multilayer article for use in solid phase extraction that includes at least two porous support layers and a solid phase extraction medium, wherein the porous support layers are thermo-mechanically attached at at least one thermo-mechanical attachment site. At least one of the porous support layers can be a prefilter layer.