Patents by Inventor Thomas Forester

Thomas Forester 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).

  • Aluminum oxide/aluminum oxynitride/group IVB metal nitride abrasive particles derived from a sol-gel process
    Patent number: 4855264
    Abstract: The present invention provides a nearly fully dense, microcrystalline, composite ceramic abrasive particle comprising grains of alumina, gamma-aluminum oxynitride and, optionally, a Periodic Group IVB metal nitride in the system Al.sub.2 O.sub.3 /ALON/Group IVB metal nitride. In another aspect, two different processes for making an abrasive particle such as an abrasive grit, comprising a multiphase mixture of microcrystalline components in this system using sol gel techniques and pressureless reaction-sintering, are disclosed.
    Type: Grant
    Filed: April 15, 1988
    Date of Patent: August 8, 1989
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: James P. Mathers, William P. Wood, Thomas Forester