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. 05, 2002
Filed:
Mar. 15, 1999
Applicant:
Inventors:
Kurt C. Carlson, Nashville, TN (US);
Roger L. Langer, Hudson, WI (US);
Assignee:
3M Innovative Properties Company, St. Paul, MN (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D21H 2/708 ; D21H 1/326 ; D21H 1/314 ; B01D 3/908 ; B01J 2/028 ;
U.S. Cl.
CPC ...
D21H 2/708 ; D21H 1/326 ; D21H 1/314 ; B01D 3/908 ; B01J 2/028 ;
Abstract
A wet-laid, porous solid phase extraction sheet material that contains both active particles and binder and that possesses excellent wet strength is described. The binder is present in a relatively small amount while the particles are present in a relatively large amount. The sheet material is sufficiently strong and flexible so as to be pleatable so that, for example, it can be used in a cartridge device.