Patents by Inventor Jal N. Kerawalla

Jal N. Kerawalla 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).

  • Bonded fibrous articles
    Patent number: 5318650
    Abstract: Bonding non-woven fibrous structures, especially using polyester fibers as the load-bearing elements, with electromagnetic radiation after applying an electromagnetic radiation susceptor to a polyester fiber with a high amorphous content so it acts as a binder fiber between load-bearing elements.
    Type: Grant
    Filed: September 25, 1992
    Date of Patent: June 7, 1994
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Jal N. Kerawalla
  • Composite sheet moldable material
    Patent number: 5286557
    Abstract: Thermoplastic polyester fiber reinforced polyester panels which have extremely smooth and paintable surface and which can be deformed when hot to conform to a molded useful article without substantial loss in molecular weight or physical properties such as strength.
    Type: Grant
    Filed: November 5, 1992
    Date of Patent: February 15, 1994
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Karl I. Jacob, Jal N. Kerawalla
  • Bonded fibrous articles
    Patent number: 5154969
    Abstract: Bonding non-woven fibrous structures, especially using polyester fibers as the load-bearing elements, with electromagnetic radiation after applying an electromagnetic radiation susceptor to a polyester fiber with a high amorphous content so it acts as a binder fiber between load-bearing elements.
    Type: Grant
    Filed: May 16, 1991
    Date of Patent: October 13, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Jal N. Kerawalla
  • Fabrics of polyester copolymer fibers: dyeing the heat set fabric
    Patent number: 5076810
    Abstract: Improved fabrics of fibers of a copolymer of ethylene terephthalate/hexahydroterephthalate containing a high proportion of hexahydroterephthalate are obtained by processing the fabrics and fibers within critical temperature ranges.
    Type: Grant
    Filed: August 29, 1990
    Date of Patent: December 31, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Jal N. Kerawalla, Veronika S. Foldi
  • Reinforcement cord
    Patent number: 3977172
    Abstract: A cord useful for mechanical rubber goods, e.g. tires, V-belts, conveyor belts, composed of twisted plies of poly(p-phenyleneterephthalamide) continuous filaments and nylon or polyester continuous filaments.
    Type: Grant
    Filed: February 6, 1975
    Date of Patent: August 31, 1976
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Jal N. Kerawalla