Patents by Inventor Robin William Dexter

Robin William Dexter 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).

  • pH-sensitive microcapsules
    Patent number: 6500447
    Abstract: The present invention provides pH-sensitive micro-capsules, compositions containing them, methods for their preparation and methods for their use.
    Type: Grant
    Filed: August 13, 1999
    Date of Patent: December 31, 2002
    Assignee: BASF Aktiengesellschaft
    Inventors: Robin William Dexter, Brian Eric Benoff
  • pH-sensitive microcapsules
    Patent number: 6022501
    Abstract: The present invention provides pH-sensitive microcapsules, compositions containing them, methods for their preparation and methods for their use.
    Type: Grant
    Filed: August 15, 1996
    Date of Patent: February 8, 2000
    Assignee: American Cyanamid Company
    Inventors: Robin William Dexter, Brian Eric Benoff
  • Process for the preparation of microcapsule compositions
    Patent number: 5910314
    Abstract: The present invention provides a process for the preparation of microcapsule compositions, methods for using those microcapsule compositions, compositions containing those microcapsule compositions and microcapsules prepared by the process of the present invention.
    Type: Grant
    Filed: October 7, 1997
    Date of Patent: June 8, 1999
    Assignee: American Cyanamid Company
    Inventors: Brian Eric Benoff, Robin William Dexter
  • Process for the preparation of microcapsule compositions
    Patent number: 5705174
    Abstract: The present invention provides a process for the preparation of microcapsule compositions, methods for using those microcapsule compositions, compositions containing those microcapsule compositions and microcapsules prepared by the process of the present invention.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: January 6, 1998
    Assignee: American Cyanamid Company
    Inventors: Brian Eric Benoff, Robin William Dexter
  • Selective flocculation of minerals from a mixture or an ore
    Patent number: 4090955
    Abstract: Modification of a polyacrylamide to provide a content of N-hydroxymethyl groups thereon results in a selective flocculant which is effective in separating mineral values from an ore or mixture.
    Type: Grant
    Filed: May 5, 1976
    Date of Patent: May 23, 1978
    Assignee: American Cyanamid Company
    Inventors: Robin William Dexter, Douglas Rusling