Patents by Inventor David J. E. Hollely

David J. E. Hollely 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).

  • Method and apparatus for cryogenic grinding
    Patent number: 4273294
    Abstract: The production rate of a conventional cryogenic grinding system incorporating an impact mill may be increased by (a) providing means to allow at least 70% of the embrittled material entering the mill to leave the mill before it passes the inlet; and (b) providing means to restrict the flow of the cold gas through the impact mill.The product leaving the impact mill is screened and any oversize is preferably recycled to the impact mill.
    Type: Grant
    Filed: May 31, 1979
    Date of Patent: June 16, 1981
    Assignee: Air Products and Chemicals, Inc.
    Inventors: David J. E. Hollely, Norris W. Shepherd