Patents by Inventor Charles Randolph Landis

Charles Randolph Landis 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).

  • Compositions and methods for manufacturing waxes filled with intercalates and exfoliates formed with oligomers and polymers
    Patent number: 5837763
    Abstract: Compositions and methods that include a wax, in an amount of about 20% to about 99.95% by weight, containing an intercalate, or exfoliate thereof, in an amount of about 0.05% to about 80% by weight of the composition formed by contacting a layered phyllosilicate with an oligomer and/or polymer to sorb or intercalate the intercalant polymer or mixtures of intercalant polymers between adjacent phyllosilicate platelets. Sufficient intercalant polymer is sorbed between adjacent phyllosilicate platelets to expand the spacing between adjacent platelets (interlayer spacing) to a distance of at least about 5 .ANG., preferably to at least about 10 .ANG. (as measured after water removal) and more preferably in the range of about 30-45 .ANG., so that the intercalate easily can be exfoliated, sometimes naturally, without shearing being necessary.
    Type: Grant
    Filed: January 3, 1996
    Date of Patent: November 17, 1998
    Assignee: AMCOL International Corporation
    Inventors: Robert Matthew Ferraro, Charles Randolph Landis, Gary W. Beall, Semeon Tsipursky, Anatoliy Sorokin, Anatoliy Goldman