Patents by Inventor Stephen M. Fagan

Stephen M. Fagan 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 of stabilizing unsaturated organic compounds from polymerization
    Patent number: 6287483
    Abstract: A method for stabilizing an unsaturated polymerizable organic compound from premature polymerization includes addition thereto of an imidazoline or imidazolidine compound, optionally with ring substituents including hydroxyl, oxyl, or oxide moieties as well as aliphatic, alicyclic and/or heterocyclic moieties.
    Type: Grant
    Filed: May 26, 1998
    Date of Patent: September 11, 2001
    Assignee: Uniroyal Chemical Company, Inc.
    Inventors: John M. DeMassa, Stephen M. Fagan
  • Highly branched block copolymers
    Patent number: 6172180
    Abstract: The present invention relates to a block copolymer containing 1-50 first polymer segments and 1-50 second polymer segments. Each first polymer segment has an average mole fraction of monomers possessing a branch point of 0.0001 to 1, whereas each second polymer segment has an average mole fraction of monomers possessing a branch point of 0 to 0.5. The average molecular weights range from 5-2,000 kDa for the first polymer segments, which constitute 5-95% by weight of the block copolymer. The average molecular weights also range from 5-2,000 kDa for the second polymer segments, which constitute 5-95% by weight of the block copolymer. The ratio of the average mole fraction of monomers possessing a branch point of the second polymer segments to that of the first polymer segments is 0 to 0.5. An example of such a copolymer has ethylene oxide or ethylene oxide/propylene oxide as the first polymer segment and polysulfone as the second polymer segment. This block copolymer can further be blended with a bulk polymer.
    Type: Grant
    Filed: August 25, 1998
    Date of Patent: January 9, 2001
    Assignee: Circe Biomedical, Inc.
    Inventors: Lawrence F. Hancock, Stephen M. Fagan, Claudy J.-P. Mullon
  • Process for the preparation of imidazoline nitroxyl
    Patent number: 5849929
    Abstract: A process is provided for the preparation of imidazoline derivatives such as imidazoline nitroxyls and 1-hydroxy imidazoline.
    Type: Grant
    Filed: September 26, 1997
    Date of Patent: December 15, 1998
    Assignee: Uniroyal Chemical Company, Inc.
    Inventors: Leonid B. Volodarsky, Stephen M. Fagan