Patents by Inventor Krishna M. R. Kallury

Krishna M. R. Kallury 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).

  • Polymer with superior polar retention for sample pretreatment
    Patent number: 7056858
    Abstract: A polymeric sorbent that can be employed in the extraction and purification of polar and nonpolar molecules from a complex media (e.g. pharmaceuticals from biological matrices) by solid phase extraction (SPE). The sorbent exhibits a strong capacity for the retention of polar molecules and can facilitate the recovery of compounds possessing a range of polarities while furnishing clean extracts showing low ion suppression. The polymer is wettable and remains wetted over long periods of time.
    Type: Grant
    Filed: June 16, 2005
    Date of Patent: June 6, 2006
    Assignee: Varian, Inc.
    Inventors: Krishna M. R. Kallury, David C. Jones, Vipul J. Shah
  • Polymer with superior polar retention for sample pretreatment
    Patent number: 6926823
    Abstract: A polymeric sorbent that can be employed in the extraction and purification of polar and nonpolar molecules from a complex media (e.g. pharmaceuticals from biological matrices) by solid phase extraction (SPE). The sorbent exhibits a strong capacity for the retention of polar molecules and can facilitate the recovery of compounds possessing a range of polarities while furnishing clean extracts showing low ion suppression. The polymer is wettable and remains wetted over long periods of time.
    Type: Grant
    Filed: September 23, 2002
    Date of Patent: August 9, 2005
    Assignee: Varian, Inc.
    Inventors: Krishna M. R. Kallury, David C. Jones, Vipul J. Shah
  • Polymer with superior polar retention for sample pretreatment
    Publication number: 20030229191
    Abstract: A polymeric sorbent that can be employed in the extraction and purification of polar and nonpolar molecules from a complex media (e.g. pharmaceuticals from biological matrices) by solid phase extraction (SPE). The sorbent exhibits a strong capacity for the retention of polar molecules and can facilitate the recovery of compounds possessing a range of polarities while furnishing clean extracts showing low ion suppression. The polymer is wettable and remains wetted over long periods of time.
    Type: Application
    Filed: September 23, 2002
    Publication date: December 11, 2003
    Inventors: Krishna M.R. Kallury, David C. Jones, Vipul J. Shah
  • Immobilization of biologically active protein on a support with a 7-18 carbon spacer and a bifunctional phospholipid
    Patent number: 5405766
    Abstract: Enzymes and certain other bioactive substances are immobilized on solid substrates which have sufficient functional groups such as hydroxyl or carboxyl. The bioactive substances are linked to the substrates through spacer compounds having a long open alkyl chain with 7-18 carbon atoms and also through phospholipid intermediates. The spacer compound is chemically linked to the substrate. The phospholipid is covalently linked to the spacer compound. Immobilized bioactive substances of the invention exhibit a marked increase in activity and stability. In a preferred embodiment, immobilized enzymes having a high degree of resistance to thermal inactivation are prepared.
    Type: Grant
    Filed: March 25, 1993
    Date of Patent: April 11, 1995
    Assignee: Her Majesty the Queen in right of Canada, as represented by the Minister of National Defence
    Inventors: Krishna M. R. Kallury, Michael Thompson, William E. Lee