Patents by Inventor Donald H. Klosterboer

Donald H. Klosterboer 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).

  • Film cartridge and cartridge mounting insert for microfilm machines
    Patent number: 5931400
    Abstract: The cartridge is a generally cylindrical enclosure with a light seal through which a film web is drawn. The cartridge is closed with two side plates, one of which is removable. A spindle is journaled in the side plate. Film wound on a core is mounted on the spindle. The assembly is placed in an adapter insert. The adapter incorporates a motion multiplication mechanism such as gearing to drive a detectable element to rotate multiple times for each rotation of the core. The detectable element is positioned opposite a magnetic/proximity detector or optical detector on the host machine.
    Type: Grant
    Filed: March 25, 1996
    Date of Patent: August 3, 1999
    Inventor: Donald H. Klosterboer
  • Composition for and method of cleaning continuous, nonreplenished film developers and replenished film developers
    Patent number: 5304462
    Abstract: A solution containing a water-soluble stilbene sulfonic acid derivative which is used to solubilize oily dye residues in photodeveloper solutions used to develop direct positive silver halide film without generating foam is disclosed.
    Type: Grant
    Filed: July 20, 1992
    Date of Patent: April 19, 1994
    Assignee: Anacomp, Inc.
    Inventors: Donald H. Klosterboer, Jerry M. Owens
  • Disposable container for dispensing of photographic developing liquids
    Patent number: 5148208
    Abstract: A disposable container in the shape of a bottle made of molded polyethylene plastic serves as a reservoir for a photographic development liquid, that is circulated between the container's reservoir and a machine. The container has large planar sides to which good thermal contact is made by electrical heating pads for the purpose of heating the liquid within the container's reservoir. A substantially planar top surface of the container defines a central outlet aperture. This aperture connects to a feed tube which extends into the container's reservoir. The container is mounted upright to the machine's bottom surface by a screw collar. The machine's bottom surface is complementary to, and mates with, the container's top surface. A fluid-tight compressive seal is made in a first annular region about the container's central aperture by means of an O ring or gasket.
    Type: Grant
    Filed: July 20, 1990
    Date of Patent: September 15, 1992
    Assignee: Anacomp, Inc.
    Inventors: Donald H. Klosterboer, Jerry M. Owens, Aubrey E. Thompson
  • Thermographic and photothermographic materials having silver salt complexes therein
    Patent number: 4260677
    Abstract: Thermographic and photothermographic materials are provided by using organic or inorganic silver salts complexed with coordinating compounds having a gross stability constant between 4.50 and 10.00. When the complexed silver salt is in catalytic proximity to photosensitive silver halides, photothermographic elements are produced.
    Type: Grant
    Filed: March 12, 1976
    Date of Patent: April 7, 1981
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: John M. Winslow, Donald H. Klosterboer