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:
Jun. 17, 1997
Filed:
Mar. 27, 1995
Applicant:
Inventors:
Lokanathan M Iyer, Redmond, WA (US);
Yanqun Zhao, Gurnee, IL (US);
Assignee:
Abbott Laboratories, Abbott Park, IL (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B / ; G01N / ;
U.S. Cl.
CPC ...
385 12 ; 422 8206 ; 422 8207 ; 128634 ;
Abstract
The invention provides fiber-optic detectors with rapid response times for measuring analytes in aqueous solutions, including blood. The detectors, because of their size, accuracy, and sterilizability may be used in vitro. In a preferred embodiment, pellets comprising a unique, permeable terpolymer of methyl methacrylate, butyl acrylate and methacrylamidopropyltrimethylammonium chloride; and an indicator for an analyte are used as the detecting element of a fiber-optic sensor. Response times for pH testing are better than 150 seconds at t90%. The pellets are easily made by solvent casting techniques and failure rates are low.