Patents by Inventor John M. MacLeod

John M. MacLeod 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).

  • Flexible highly filled compositions
    Patent number: 5278219
    Abstract: Highly filled materials are disclosed. The material is formed from a composition of at least 4% by weight of a defined polar thermoplastic polymer, a plasticizer for the polymer and at least 90% by weight of an inorganic composition, including in elemental form. The compositions have a flexural modulus of less than 100 MPa. Preferably, the material provides attenuation against energy of greater than 0.1 keV that is equivalent to at least 0.1 mm of lead. The material may be used for containers, in apparel and other end-uses for protection against e.g. x-rays and gamma rays.
    Type: Grant
    Filed: June 25, 1992
    Date of Patent: January 11, 1994
    Inventors: Martin J. Lilley, John M. MacLeod, Raymond H. Servant