Patents by Inventor Philip D. Raby

Philip D. Raby 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).

  • Freeze-thaw stable polyacrylamide emulsions
    Patent number: 4845138
    Abstract: Water-in-oil emulsions of water-soluble polymers, i.e. polyacrylamides, which are subject to freeze-thaw degradation are stabilized against repeated freeze-thaw cycles by incorporating specific substituted succinic anhydrides.
    Type: Grant
    Filed: April 15, 1988
    Date of Patent: July 4, 1989
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Peter M. Robinson, Philip D. Raby, Nguyen Van-Det
  • Freeze-thaw stable polyacrylamide emulsions
    Patent number: 4785036
    Abstract: Water-in-oil emulsions of water-soluble polymers, i.e. polyacrylamides, which are subject to freeze-thaw degradation are stabilized against repeated freeze-thaw cycles by incorporating specific substituted succinic anhydrides.
    Type: Grant
    Filed: May 27, 1987
    Date of Patent: November 15, 1988
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Peter M. Robinson, Philip D. Raby, Nguyen Van-Det