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:
Jan. 18, 2000
Filed:
Sep. 04, 1997
Applicant:
Inventors:
Alan Robert Craig, Wilmington, DE (US);
Michael Patrick Reidy, Foster City, CA (US);
Chengrong Wang, Hockessin, DE (US);
Assignee:
Dade Behring Inc., Deerfield, IL (US);
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
204418 ; 7386323 ;
Abstract
A method for extending the uselife of a chloride ion selective membrane of an ISE sensor by providing a two-layer sensor structure wherein an quaternized ion-selective polymeric layer is positioned between a sample to be analyzed and a conventional polymeric ISE membrane containing an ion-exchange agent. Also provided are polymer compositions comprised methyl methacrylate/choloromethyl styrene copolymer and mixtures thereof that have been reacted with tertiary amines.