Patents by Inventor Felix O. Sam

Felix O. Sam 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 preparing low-density flexible polyurethane foams, and the polyurethane foams obtained
    Patent number: 5340845
    Abstract: A process for preparing low-density flexible polyurethane foams obtained, in the absence of expanding agents of chlorofluoroalkane type, by the polycondensation of an organic polyisocyanate with at least one polyol of equivalent weight exceeding 50 and functionality equal to or greater than 2, in the presence of an expanding system comprising water and dimethyl carbonate (DMC).
    Type: Grant
    Filed: July 21, 1993
    Date of Patent: August 23, 1994
    Assignee: Enichem, S.p.A.
    Inventors: Dario Stefani, Felix O. Sam, Gianflavio Lunardon