Patents by Inventor Donald William Frey

Donald William Frey 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).

  • Particulate or particle-bound chelating agents
    Patent number: 7427361
    Abstract: The invention generally relates to compositions and methods for chemically mechanically polishing a substrate, including a polishing accelerator, which is normally one or more oxidizers, an abrasive material, and chelating particles and/or metal-absorbent clay material. In addition, the invention can also involve methods of forming chelator particles and methods of separating metal-containing ions from polishing and/or etching solutions after polishing and/or etching.
    Type: Grant
    Filed: October 23, 2003
    Date of Patent: September 23, 2008
    Assignee: DuPont Air Products NanoMaterials LLC
    Inventors: Robert J. Small, Donald William Frey, Bruce Tredinnick, Christopher G. Hayden