Patents by Inventor Andrew P. Ondush

Andrew P. Ondush 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 for fine grinding
    Patent number: 5203511
    Abstract: A method and apparatus for fine grinding materials normally difficult to grind at ambient temperature, e.g. plastic and elastomeric materials in a fluid classification type impact mill utilizing liquid cryogen to pre-cool the material to be ground, to cool the material and the mill during grinding and to recycle vaporized cryogen from the mill back into the mill as the medium for conveying material to be ground into the mill.
    Type: Grant
    Filed: March 8, 1990
    Date of Patent: April 20, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Andrew P. Ondush, Richard D. Ritter, Arthur H. Anderson
  • Apparatus for fine grinding
    Patent number: 5195695
    Abstract: A method and apparatus for fine grinding materials normally difficult to grind at ambient temperature, e.g. plastic and elastomeric materials in a fluid classification type impact mill utilizing liquid cryogen to pre-cool the material to be ground, to cool the material and the mill during grinding and to recycle vaporized cryogen from the mill back into the mill as the medium for conveying material to be ground into the mill.
    Type: Grant
    Filed: March 8, 1990
    Date of Patent: March 23, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Andrew P. Ondush, Richard D. Ritter, Arthur H. Anderson
  • Extrusion cooler with atmosphere recycle and openable top
    Patent number: 4755118
    Abstract: A cooling chamber for use in in-line association with a continuous extruder for rapidly cooling freshly extruded product, e.g. vinyl fluid hose, to prevent deformation of the fresh extrudate.
    Type: Grant
    Filed: July 16, 1987
    Date of Patent: July 5, 1988
    Assignee: Air Products and Chemicals, Inc.
    Inventors: Andrew P. Ondush, Roger A. Howells