Patents by Inventor Roy Frank Smith

Roy Frank Smith 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).

  • Method for production of poly (trimethylene carbonate)
    Patent number: 6451949
    Abstract: Disclosed is a process for the production of poly(trimethylene carbonate) which comprises reacting trimethylene carbonate, a catalyst, and an alcohol, preferably a polyhydric alcohol, under nitrogen at atmospheric pressure and a moderate temperature, in a stoichiometric ratio to give the desired molecular weight of poly(trimethylene carbonate) in the presence of a catalyst selected from the group consisting of a salt, preferably an acetate, of an element of Group IA or IIA of the Periodic Table. In an alternative embodiment, high molecular weight poly(trimethylene carbonate) is produced without the use of an initiator, using the same catalyst and longer reaction times.
    Type: Grant
    Filed: February 9, 2001
    Date of Patent: September 17, 2002
    Assignee: Shell Oil Company
    Inventors: Wyndham Henry Boon, Roy Frank Smith, David Eric Gwyn, Thomas Clayton Forschner
  • High gloss acrylic coatings with improved impact resistance cured with melamine
    Patent number: 6433131
    Abstract: Disclosed is a modified acrylic coating composition cured with melamine characterized by improved impact resistance which comprises: An acrylic polyol dissolved in a suitable solvent to 40-90% solids; 2 to 50% by weight of said acrylic polyol substituted with a polytrimethylene carbonate polyol selected from a polytrimethylene carbonate diol, a polytrimethylene carbonate triol, or a higher functionality polytrimethylene carbonate polyol; a melamine crosslinking agent; optionally a catalyst; and optionally pigments and other additives commonly used in coatings. Also disclosed in a related embodiment is a melamine/urea formaldehyde polytrimethylene carbonate coating composition that is prepared without acrylic.
    Type: Grant
    Filed: February 15, 2001
    Date of Patent: August 13, 2002
    Assignee: Shell Oil Company
    Inventors: Lichang Zhou, Shelby F. Thames, Oliver W. Smith, Thomas Clayton Forschner, Roy Frank Smith, David Eric Gwyn, Wyndham Henry Boon, Abdulai Mobolaji Dawodu
  • Method for production of poly (trimethylene carbonate)
    Publication number: 20020010308
    Abstract: Disclosed is a process for the production of poly(trimethylene carbonate) which comprises reacting trimethylene carbonate, a catalyst, and an alcohol, preferably a polyhydric alcohol, under nitrogen at atmospheric pressure and a moderate temperature, in a stoichiometric ratio to give the desired molecular weight of poly(trimethylene carbonate) in the presence of a catalyst selected from the group consisting of a salt, preferably an acetate, of an element of Group IA or IIA of the Periodic Table. In an alternative embodiment, high molecular weight poly(trimethylene carbonate) is produced without the use of an initiator, using the same catalyst and longer reaction times.
    Type: Application
    Filed: February 9, 2001
    Publication date: January 24, 2002
    Inventors: Wyndham Henry Boon, Roy Frank Smith, David Eric Gwyn, Thomas Clayton Forschner