Patents by Inventor Gerald Joseph Louis Griffin

Gerald Joseph Louis Griffin 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).

  • Low toxicity shot pellets
    Patent number: 5719352
    Abstract: Low toxicity shot or pellets for shotgun cartridges or the like comprises finely divided metallic particles, preferably a mixture of finely divided molybdenum and tungsten particles in a polymer matrix. The resulting pellets have a high density and are much less prone to damage the barrels of guns from which they are fired than prior suggested alternatives to lead shot. If desired, friction between the pellets and gun barrels may be further reduced by incorporating a lubricant, such as molybdenum sulphide or graphite in the polymer matrix.
    Type: Grant
    Filed: September 26, 1995
    Date of Patent: February 17, 1998
    Assignee: The Kent Cartridge Manufacturing Co. Limited
    Inventor: Gerald Joseph Louis Griffin
  • Synthetic resin sheet material
    Patent number: 4021388
    Abstract: A biodegradable composition comprises a synthetic resin, a biodegradable granular filler such as natural starch and preferably a substance autoxidizable to yield a peroxide which attacks the carbon to carbon linkages in the resin.
    Type: Grant
    Filed: March 10, 1976
    Date of Patent: May 3, 1977
    Assignee: Coloroll Limited
    Inventor: Gerald Joseph Louis Griffin
  • Biodegradable synthetic resin sheet material containing starch and a fatty material
    Patent number: 4016117
    Abstract: A biodegradable composition comprises a synthetic resin, a biodegradable granular filler such as natural starch and preferably a substance autoxidizable to yield a peroxide which attacks the carbon to carbon linkages in the resin.
    Type: Grant
    Filed: November 25, 1974
    Date of Patent: April 5, 1977
    Assignee: Coloroll Limited
    Inventor: Gerald Joseph Louis Griffin