Patents by Inventor David Cowan

David Cowan 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).

  • Heat-sealable, ovenable containers and method of manufacture
    Patent number: 4387551
    Abstract: A heat-sealable, ovenable container and method of manufacture wherein one of the components of the container, for example, the tray, is provided with a thermoplastic polyester coating and the other component, for example, the lid, is provided with a thermosetting polyester coating, said coatings cooperating to produce a self-venting, easy-tear, sanitary seal.
    Type: Grant
    Filed: December 31, 1980
    Date of Patent: June 14, 1983
    Assignee: Maryland Cup Corporation
    Inventor: David A. Cowan
  • Heat-sealable, ovenable containers
    Patent number: 4261504
    Abstract: A heat-sealable, ovenable container and method of manufacture wherein one of the components of the container, for example, the tray, is provided with a thermoplastic polyester coating and the other component, for example, the lid, is provided with a thermosetting polyester coating, said coatings cooperating to produce a self-venting, easy-tear, sanitary seal.
    Type: Grant
    Filed: September 21, 1979
    Date of Patent: April 14, 1981
    Assignee: Maryland Cup Corporation
    Inventor: David A. Cowan
  • Pepper mill
    Patent number: D259089
    Type: Grant
    Filed: April 27, 1979
    Date of Patent: May 5, 1981
    Assignee: Cole & Mason, U.S.A., Ltd.
    Inventor: David A. Cowan
  • Combined salt and pepper mill
    Patent number: D259090
    Type: Grant
    Filed: April 27, 1979
    Date of Patent: May 5, 1981
    Assignee: Cole & Mason, U.S.A., Ltd.
    Inventor: David A. Cowan
  • Condiment mill
    Patent number: D268637
    Type: Grant
    Filed: July 30, 1980
    Date of Patent: April 19, 1983
    Assignee: Cole & Mason, USA, Ltd.
    Inventor: David A. Cowan
  • Condiment grinding device
    Patent number: D289848
    Type: Grant
    Filed: October 7, 1983
    Date of Patent: May 19, 1987
    Inventor: David A. Cowan