Patents by Inventor Ronald S. Park

Ronald S. Park 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 making vandal resistant seat
    Patent number: 5456777
    Abstract: An cut-resistant seat or seating material is disclosed together with methods of forming such a material. The material comprises at least one layer of flexible metal or non-metal matrix material embedded within a compressed flexible foam material. The foam material may be a fire retardant flame material.
    Type: Grant
    Filed: July 12, 1993
    Date of Patent: October 10, 1995
    Assignee: Henderson's Industries Pty. Ltd.
    Inventors: Ronald S. Park, John A. Clements, William H. Maloney
  • Method of making vandal resistant seat
    Patent number: 5259896
    Abstract: A cut-resistant seat or seating material is disclosed together with methods of forming such a material. The material comprises at least one layer of flexible metal or non-metal matrix material embedded within a compressed flexible foam material. The foam material may be a fire retardant flame material.
    Type: Grant
    Filed: May 17, 1989
    Date of Patent: November 9, 1993
    Assignee: Henderson's Industries Pty. Ltd.
    Inventors: Ronald S. Park, John A. Clements, William H. Maloney
  • Vandal resistant seat
    Patent number: 4828908
    Abstract: An cut-resistant seat or seating material is disclosed together with methods of forming such a material. The material comprises at least one layer of flexible metal or non-metal matrix material embedded within a compressed flexible foam material. The foam material may be a fire retardant flame material.
    Type: Grant
    Filed: April 29, 1988
    Date of Patent: May 9, 1989
    Assignee: Henderson's Federal Spring Works Pty. Ltd.
    Inventors: Ronald S. Park, John A. Clements, William H. Maloney
  • Polyether-based polyurethane foams including a flame-retardant system containing antimony trioxide, a chlorinated paraffin and alumina trihydrate and method of preparation
    Patent number: 4266042
    Abstract: Polyether-based polyurethane foams including as the flame-retardant, an antimony compound, chlorine derived from at least one chlorinated paraffin and alumina trihydrate, and the polyol used to prepare the foams being a diol- or triol-based polyol wherein at least 50% of the hydroxyl end groups are primary hydroxyl end groups, having good flame-retardancy and without any significant fall-off in physical properties as the foams are able to tolerate relatively high levels of the flame retardant.
    Type: Grant
    Filed: June 27, 1979
    Date of Patent: May 5, 1981
    Assignee: Henderson's Industries Limited
    Inventor: Ronald S. Park