Patents by Inventor John A. Froehlich

John A. Froehlich 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).

  • Patent number: 5359184
    Abstract: Optical encoding of a cuvette or other object is provided by means of multiple facets molded integrally into flanges or other portions of the object, which facets selectively refract light passing therethrough in accordance with a predetermined code. The detector for the coded light includes a separate detector for each code state of the facets, with the detector having a different output when no facets are between a light source and the detectors. The facets are preferably bevels, which are selectively angled in accordance with the code.
    Type: Grant
    Filed: November 8, 1991
    Date of Patent: October 25, 1994
    Assignee: Medical Laboratory Automation, Inc.
    Inventors: John A. Froehlich, Eric S. Anderson
  • Patent number: 5098661
    Abstract: A cuvette suitable for use with photometric blood testing apparatus and the like. The cuvette includes a receptacle having flanges on either side having locating holes therein. The flanges are flexible to enhance the positioning of the cuvette. Single and dual cuvette embodiments are described.The invention additionally includes means for encoding a cuvette for optical detection thereof by means of multiple facets which reflect light passing therethrough molded integrally in the flanges.
    Type: Grant
    Filed: November 16, 1988
    Date of Patent: March 24, 1992
    Assignee: Medical Laboratory Automation, Inc.
    Inventors: John A. Froehlich, Eric S. Anderson
  • Patent number: 4166094
    Abstract: An automatic fluid sampling transport system for use in fields such as atomic absorption spectroscopy and liquid chromatography. The system described provides for circular tray sampling having an increased through-put capacity. This is accomplished by providing a system which allows the sampling of vials in concentric circles on the same carousel. The mechanism described synchronizes the raising and lowering of the sample probe to the incremental, rotational movement of the carousel and the rotational movement of the probe carrying means between successive sample vials in the various concentric circles. The mechanism is relatively simple and is adaptable to provide a plurality of such concentric circles of openings to expand the through-put capability of the system.
    Type: Grant
    Filed: May 22, 1978
    Date of Patent: August 28, 1979
    Assignee: The Perkin-Elmer Corporation
    Inventors: John A. Froehlich, Roman Czernik, Chester G. Fisher, III