Patents by Inventor Richard T. Warburton

Richard T. Warburton 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 forming an orifice in a structure during molding thereof
    Patent number: 5114651
    Abstract: A pair of male and female mold parts in association with a closure for forming orifices during the thermal formation of a structure.
    Type: Grant
    Filed: March 11, 1991
    Date of Patent: May 19, 1992
    Assignee: Mobil Oil Corporation
    Inventor: Richard T. Warburton
  • Hinged-lid food container with sealable compartments employing front and side latching means
    Patent number: 5094355
    Abstract: A hinged-lid food container having sealable compartments for the discrete storage and dispensing of a plurality of various comestibles, in which a cover member is adapted to sealingly isolate each compartment in the closed condition of the container.
    Type: Grant
    Filed: December 20, 1990
    Date of Patent: March 10, 1992
    Assignee: Mobil Oil Corporation
    Inventors: Terry A. Clark, Richard T. Warburton
  • Latching structure for food container
    Patent number: 5046659
    Abstract: Latching structure for thermoformed plastic containers for food and the like wherein the lid and base of the containers are each provided with mating male and female elongated elements where the locking takes place at the end of the elongated elements rather than along the sides of these elements.
    Type: Grant
    Filed: November 13, 1990
    Date of Patent: September 10, 1991
    Assignee: Mobil Oil Corporation
    Inventor: Richard T. Warburton
  • Mold apparatus for forming an orifice in a structure during molding thereof
    Patent number: 5032106
    Abstract: A pair of male and female mold parts for forming orifices during the thermal formation of a structure.
    Type: Grant
    Filed: December 18, 1989
    Date of Patent: July 16, 1991
    Assignee: Mobil Oil Corporation
    Inventor: Richard T. Warburton
  • Method for molding containers and forming hole therein
    Patent number: 5019313
    Abstract: A male and female mold parts combination for forming a latch opening in a container molded from a softened sheet of plastic having a female mold key member arranged on the female mold part; a male mold key member arranged on the male mold part; a cutting edge adjacent to a planar face of one key and a vertical surface having a bevelled edge surface on the other key. The keys being normally registered so that on closure of the mold parts, initial contact will involve the cutting edge, the bevelled edge surface and the plastic therebetween. One of the keys is fixed in one of the mold parts and the other of the keys being located in the other of the mold parts and free to move independently of its mold part so that on closure of the mold parts the cutting edge will ride off the bevelled edge surface and slide across the vertical surface piercing and enlarging a latch opening in the plastic.
    Type: Grant
    Filed: January 18, 1990
    Date of Patent: May 28, 1991
    Assignee: Mobil Oil Corporation
    Inventor: Richard T. Warburton
  • Mold apparatus for molding containers and forming hole therein
    Patent number: 4909721
    Abstract: A male and female mold parts combination for forming a latch opening in a container molded from a softened sheet of plastic having a female mold key member arranged on the female mold part; a male mold key member arranged on the male mold part; a cutting edge adjacent to a planar face of one key and a vertical surface having a bevelled edge surface on the other key. The keys being normally registered so that on closure of the mold parts, initial contact will involve the cutting edge, the bevelled edge surface and the plastic therebetween. One of the keys is fixed in one of the mold parts and the other of the keys being located in the other of the mold parts and free to move independently of its mold part so that on closure of the mold parts the cutting edge will ride off the bevelled edge surface and slide across the vertical surface piercing and enlarging a latch opening in the plastic.
    Type: Grant
    Filed: February 16, 1989
    Date of Patent: March 20, 1990
    Assignee: Mobil Oil Corporation
    Inventor: Richard T. Warburton
  • Food container
    Patent number: D358091
    Type: Grant
    Filed: July 8, 1993
    Date of Patent: May 9, 1995
    Assignee: Mobil Oil Corporation
    Inventor: Richard T. Warburton