Patents by Inventor Robert G. Sylvester

Robert G. Sylvester 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).

  • Process for providing ethanol
    Patent number: 7666282
    Abstract: The invention is a process for the purification of ethanol. In one embodiment the process includes boiling a degassed beer feed (106) in a pre-boiler (110) to provide a vapor by-pass fraction (112) that by-passes the conventional beer column and is fed into the rectifier column (124). The process allows free capacity in the rectifier column of new or established plants to be filled by ethanol-water vapor and/or condensate streams that do not originate from the beer column.
    Type: Grant
    Filed: December 28, 2005
    Date of Patent: February 23, 2010
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Robert G. Sylvester, Stephen Thomas Breske, David A. Culver, Bruce M. Vrana
  • Polyurethane foam product and process
    Patent number: 4992483
    Abstract: A process for preparing polyurethane foams comprising reacting polyol with polyfunctional isocyanate in the presence of an auxiliary blowing agent comprising 1 monofluoro 1,1 dichloroethane. The amount of auxiliary blowing agent used is from 60 to 80 wt % of the amount of conventional auxiliary blowing agent consisting of trichlorofluoromethane that would be required to obtain comparable foam density and either firmness or compressive strength.
    Type: Grant
    Filed: August 18, 1989
    Date of Patent: February 12, 1991
    Assignee: Du Pont Canada Inc.
    Inventor: Robert G. Sylvester