Patents by Inventor Ralph E. Clark

Ralph E. Clark 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).

  • Identification of image displays and their component parts
    Patent number: 5214350
    Abstract: An image display such as a cathode ray tube or flat panel display has an envelope with an external surface and an interior or otherwise non-external surface. Encapsulated indicia may be located on an external surface, or in the preferred embodiment, on an internal surface readable from the external surface. The indicia, being encapsulated on the interior surface, are safe from degradation, thus allowing for easy formation of the indicia by simple printing means which utilize fluid inks.
    Type: Grant
    Filed: September 11, 1991
    Date of Patent: May 25, 1993
    Assignee: Zenith Electronics
    Inventors: Thomas M. Remec, Ralph E. Clarke, Jr.
  • Air chiller/drier
    Patent number: 4287724
    Abstract: A device for cooling air to a temperature below its dew point and for separating condensed liquid from the cooled air to produce dry air is disclosed.
    Type: Grant
    Filed: December 17, 1979
    Date of Patent: September 8, 1981
    Assignee: Morehouse Industries, Inc.
    Inventor: Ralph E. Clark
  • Recovery of 1,3-butadiene
    Patent number: 4277313
    Abstract: This invention provides a process for separating 1,3-butadiene from a C.sub.4 -hydrocarbon mixture which contains C.sub.4 -alkyne components.In one embodiment, the invention involves a first step hydrogenation procedure for selectively hydrogenating the C.sub.4 -alkyne components, and a second step extractive distillation procedure for separating out a 1,3-butadiene rich selective solvent extract phase.
    Type: Grant
    Filed: March 27, 1980
    Date of Patent: July 7, 1981
    Assignee: El Paso Products Company
    Inventors: Yuv R. Mehra, Ralph E. Clark
  • Bird seed saver
    Patent number: D509326
    Type: Grant
    Filed: August 11, 2004
    Date of Patent: September 6, 2005
    Inventor: Ralph E. Clark