Patents by Inventor Kevin Snowden

Kevin Snowden 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).

  • Acid tolerant calcium carbonate composition and uses therefor
    Patent number: 5711799
    Abstract: An improved form of calcium carbonate which is acid tolerant to enable its use as a filler material in the making of neutral to weakly acid paper, and a process for producing this acid tolerant calcium carbonate are provided. This acid tolerant calcium carbonate comprises a mixture of calcium carbonate with at least about 0.1 percent, based on the dry weight of the calcium carbonate, of sodium aluminate together with at least about 0.1 percent, based on the dry weight of the calcium carbonate, of one or more weak acids.
    Type: Grant
    Filed: March 13, 1996
    Date of Patent: January 27, 1998
    Assignee: ECC International Inc.
    Inventors: Kevin Snowden, Jose M. Rodriguez, Kuan-Ting Wu