Patents by Inventor Raymond G. Krause, deceased

Raymond G. Krause, deceased 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).

  • Cassette for blood smear slides and cooperative slide ejection assembly
    Patent number: 5871696
    Abstract: A cassette for blood smear slides has a holder portion for supporting slides in a stack and an alignment surface for orienting a bottom slide with respect to a slide egress window. A force plate member is urged against the top slide in the stack with a constant force spring to align the bottom slide and to retain the slide stack. A slide extraction device is constructed to enter the cassette and has follower pins which ride on cam surfaces of the cassette to precisely position detent edges vis a vis an edge of a bottom slide of the stack. The cassette also has structure for signaling an empty condition.
    Type: Grant
    Filed: July 17, 1997
    Date of Patent: February 16, 1999
    Assignee: Coulter International Corp.
    Inventors: Daniel B. Roberts, Raymond G. Krause, deceased, Armando J. Valledor, Manuel Calvo, Brian Scrivens