Patents by Inventor Philip DeVries

Philip DeVries 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 verifying ultraviolet sterilization
    Patent number: 6475433
    Abstract: A photochromic material which undergoes a change in appearance when exposed to ultraviolet (UV) radiation in the UVC band provides a visual indication of the degree of sterilization achieved by a UV emitting device. The photochromic material is placed either on the UV source or in or adjacent the sample being sterilized. The photochromic material is formulated to undergo a certain degree of change in appearance when it has been exposed to a level of UV which corresponds to effective sterilization of the sample being sterilized. An optional reference card bears a color or opacity reference for comparison with the exposed photochromic material.
    Type: Grant
    Filed: January 16, 2001
    Date of Patent: November 5, 2002
    Assignee: EBW Electronics, Inc.
    Inventors: Gram J. McGeorge, Philip DeVries
  • Method and apparatus for verifying ultraviolent sterilization
    Publication number: 20010048891
    Abstract: A photochromic material which undergoes a change in appearance when exposed to ultraviolet (UV) radiation in the UVC band provides a visual indication of the degree of sterilization achieved by a UV emitting device. The photochromic material is placed either on the UV source or in or adjacent the sample being sterilized. The photochromic material is formulated to undergo a certain degree of change in appearance when it has been exposed to a level of UV which corresponds to effective sterilization of the sample being sterilized. An optional reference card bears a color or opacity reference for comparison with the exposed photochromic material.
    Type: Application
    Filed: January 16, 2001
    Publication date: December 6, 2001
    Inventors: Gram J. McGeorge, Philip DeVries