Patents by Inventor Mark B. Littlejohn

Mark B. Littlejohn 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).

  • Patent number: 6120863
    Abstract: Disposable food contact compatible microwaveable containers having one or more micronodular surface are disclosed. These containers, including plates, bowls, cups, trays, buckets, souffle dishes, and lids are prepared from a polyolefin selected from the group consisting of polypropylene, polypropylene polyethylene copolymer or blends, and mixtures of these, mica, and pigment and are thermoformed into the shape of a the aforementioned containers exhibiting (a) a micronodular surface on at least one side of the surface; (b) a melting point of not less than about 250.degree. F.; said containers being dimensionally stable and resistant to grease, sugar, and water at temperatures up to at least 250.degree. F. and being of sufficient toughness to resist cutting by serrated polystyrene flatware.
    Type: Grant
    Filed: October 8, 1997
    Date of Patent: September 19, 2000
    Assignee: Fort James Corporation
    Inventors: Cristian M. Neculescu, Richard J. Rogers, Mark B. Littlejohn, Anthony J. Swiontek
  • Patent number: 6100512
    Abstract: Disposable food contact compatible microwaveable containers having at least one micronodular surface are disclosed. These containers including plates, bowls, cups, trays, buckets, souffle dishes, and lids are prepared from polypropylene or propylene-ethylene copolymer or blends, talc and mica mixtures and pigment and are thermoformed into the shape of the desired article of manufacture exhibiting (a) a micronodular surface on at least one side; (b) a melting point of not less than about 250.degree. F.; these articles of manufacture being dimensionally stable and resistant to grease, sugar, and water at temperatures up to at least 250.degree. F. and being of sufficient toughness to resist cutting by serrated polystyrene flatware.
    Type: Grant
    Filed: August 19, 1997
    Date of Patent: August 8, 2000
    Assignee: Fort James Corporation
    Inventors: Cristian M. Neculescu, Richard J. Rogers, Mark B. Littlejohn
  • Patent number: 5326020
    Abstract: A container formed from a unitary paperboard blank having a substantially planar inner region, a sidewall region and a rim region formed about the periphery thereof is disclosed. The sidewall region includes a generally annular region flaring upwardly and outwardly from a periphery of the planar inner region and a first frusto-conical region adjoining the annular region with the frusto-conical region sloping outwardly and upwardly from the annular region. The rim region includes an outwardly flaring arcuate annular region adjoining an outer periphery of the first frusto-conical region, and a second frusto-conical region extending substantially tangentially from the arcuate annular region. The second frusto-conical region extends outwardly and downwardly at an angle of about 6.degree. to about 12.degree. and preferably about 6.degree.-10.5.degree. relative to the plane defined by the planar inner region.
    Type: Grant
    Filed: August 31, 1993
    Date of Patent: July 5, 1994
    Assignee: James River Corporation of America
    Inventors: James O. Cheshire, Mark B. Littlejohn, Denny R. Garns, Erland S. Sandstrom
  • Patent number: 5088640
    Abstract: A pressed paper includes a planar center having an outer peripheral surface. The planar center forms a bottom for the pressed paper plate. An outwardly projecting side wall includes a first rim portion joined to the outer peripheral surface of the planar center and a second rim portion joined to the first rim portion. A third rim portion is joined to the second rim portion of the outwardly projecting side wall. A fourth rim portion is provided for forming an outer edge for the container. The first rim portion is joined to the peripheral surface of the planar center at an angle having a first predetermined radius. The second rim portion is joined to the first rim portion at an angle having a second predetermined radius. The third rim portion is joined to the second rim portion at an angle having a third predetermined radius. The fourth rim portion is joined to the third rim portion at an angle having a fourth predetermined radius.
    Type: Grant
    Filed: September 6, 1991
    Date of Patent: February 18, 1992
    Assignee: James River Corporation of Virginia
    Inventor: Mark B. Littlejohn
  • Patent number: D346934
    Type: Grant
    Filed: March 21, 1991
    Date of Patent: May 17, 1994
    Assignee: James River Corporation of Virginia
    Inventor: Mark B. Littlejohn
  • Patent number: D434605
    Type: Grant
    Filed: June 18, 1999
    Date of Patent: December 5, 2000
    Assignee: Fort James Corporation
    Inventors: Mark B. Littlejohn, Cristian M. Neculescu, Margaret P. Neer, Anthony J. Swiontek, Brigitte K. Weigert