Patents by Inventor Stephen J. Cato

Stephen J. Cato 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).

  • Triazolinethione-containing polymer
    Patent number: 4740568
    Abstract: A poly(triazolinethione) is prepared by a process comprising the steps:(a) providing a poly(acylthiosemicarbazide),(b) cyclodehydrating the poly(acylthiosemicarbazide) by subjecting it to an elevated temperature in the presence of an aqueous alkaline solution to form a polyanion of a poly(triazolinethione),(c) treating the polyanion of the poly(triazolinethione) with aqueous acid solution to provide the poly(triazolinethione), and(d) isolating the resulting poly(triazolinethione).
    Type: Grant
    Filed: September 3, 1986
    Date of Patent: April 26, 1988
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Alan R. Katritzky, Stephen J. Cato, Jerald K. Rasmussen, Larry R. Krepski, Steven M. Heilmann
  • Triazolinethione-containing polymer
    Patent number: 4624995
    Abstract: A poly(triazolinethione) is prepared by a process comprising the steps:(a) providing a poly(acylthiosemicarbazide),(b) cyclodehydrating the poly(acylthiosemicarbazide) by subjecting it to an elevated temperature in the presence of an aqueous alkaline solution to form a polyanion of a poly(triazolinethione),(c) treating the polyanion of the poly(triazolinethione) with aqueous acid solution to provide the poly(triazolinethione), and(d) isolating the resulting poly(triazolinethione).
    Type: Grant
    Filed: April 9, 1985
    Date of Patent: November 25, 1986
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Alan R. Katritzky, Stephen J. Cato, Jerald K. Rasmussen, Larry R. Krepski, Steven M. Heilmann