Patents by Inventor Mabel M. Chen

Mabel M. Chen 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).

  • Substituted urea compound containing 2,2,2-trichloro-1-hydroxyethyl group
    Patent number: 4324910
    Abstract: A substituted urea compound containing at least one 2,2,2-trichloro-1-hydroxyethyl group is provided which is useful as a flame retardant for polymers such as polyurethane.
    Type: Grant
    Filed: February 20, 1981
    Date of Patent: April 13, 1982
    Assignee: Pennwalt Corporation
    Inventors: Stanley R. Sandler, Mabel M. Chen
  • Flame retardant polyol compositions and their preparation
    Patent number: 4302340
    Abstract: A flame retardant polyol composition is prepared by reacting chloral with a compound selected from the group consisting of urea, diethanolurea, dipropanolurea, thiourea, sulfamide and mixtures thereof in the presence of a polyhydroxy composition having 2 to 8 hydroxy groups. These compositions are useful for preparing flame retardant polyurethane foams.
    Type: Grant
    Filed: August 8, 1979
    Date of Patent: November 24, 1981
    Assignee: Pennwalt Corporation
    Inventors: Stanley R. Sandler, Mabel M. Chen