Patents by Inventor Raymond V. Johnson

Raymond V. Johnson 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).

  • Temperature gradient means in reactor tube of vapor deposition apparatus
    Patent number: 4256052
    Abstract: A diffusion furnace having particular utility in the processing of SOS devices wherein a temperature gradient, per unit length of furnace tube, is provided at a section of a reaction tube extending between the furnace and the scavenger and load-unload chambers in order to minimize the thermal shock to which a sapphire wafer may be subject, either at the commencement of processing when the wafer is first introduced into the furnace or at the conclusion of the processing as the wafer is being withdrawn from the furnace.
    Type: Grant
    Filed: October 2, 1979
    Date of Patent: March 17, 1981
    Assignee: RCA Corp.
    Inventors: Raymond V. Johnson, Dennis P. Biondi