Patents by Inventor Alan Robert Craig

Alan Robert Craig has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Chloride ion selective membrane electrode having improved stability and selectivity
    Patent number: 6015480
    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.
    Type: Grant
    Filed: September 4, 1997
    Date of Patent: January 18, 2000
    Assignee: Dade Behring Inc.
    Inventors: Alan Robert Craig, Michael Patrick Reidy, Chengrong Wang
  • Composition and method for manufacturing ion selective electrode sensors
    Patent number: 5964994
    Abstract: This invention pertains to fluorophoric compositions and methods of their use for enhancing visualization of various constituents of ion selective electrodes.
    Type: Grant
    Filed: November 21, 1997
    Date of Patent: October 12, 1999
    Assignee: Dade Behring Inc.
    Inventors: Alan Robert Craig, James David Hamerslag
  • Sodium ion-selective-electrode membrane having extended uselife
    Patent number: 5958201
    Abstract: A method for extending the uselife of a sodium ion selective membrane of an ISE sensor by incorporating water therein. Also provided are polymer compositions comprised of water plus the membrane compounds or residues and articles comprising such compositions.
    Type: Grant
    Filed: August 26, 1996
    Date of Patent: September 28, 1999
    Assignee: Dade Behring Inc.
    Inventors: Alan Robert Craig, Michael Patrick Reidy
  • Composition and method for manufacturing ion selective electrode sensors
    Patent number: 5951837
    Abstract: This invention pertains to fluorophoric compositions of a 7-amino-coumarin derivative and methods of their use for enhancing visualization of various constituents of ion selective electrodes.
    Type: Grant
    Filed: July 9, 1997
    Date of Patent: September 14, 1999
    Assignee: Dade Behring Inc.
    Inventors: Alan Robert Craig, James David Hamerslag
  • Post synthesis chemical modification of particle reagents
    Patent number: 5854083
    Abstract: A method is provided for enhancing the stability and increasing the activity of polymer particle reagents by incubating a polymer particle which has been covalently bound to a compound of biological interest, such as a drug, with a modifying agent that will place a negative charge on the surface of the polymer particle and reduce residual functional groups. The modifying agent is preferably an anionic nucleophile selected from the group consisting of .beta.- mercaptoacetic acid and the thiosulfates.
    Type: Grant
    Filed: August 3, 1995
    Date of Patent: December 29, 1998
    Assignee: Dade Behring Inc.
    Inventors: Victor Pichai Chu, Alan Robert Craig