Patents by Inventor Louis R. Hudoba

Louis R. Hudoba 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).

  • Screen cleaning apparatus
    Patent number: 5056948
    Abstract: A screen printing plate cleaning cabinet comprising walls having an openable portion for placing a screen printing plate in the cabinet. A dispensing subsystem comprises a scanning spray head for discharging cleaning fluid against a screen printing plate and a filter and drain subsystem utilizes pneumatically powered pumps for removing residue and cleaning fluid and pumping the residue and cleaning fluid through filters.
    Type: Grant
    Filed: October 30, 1989
    Date of Patent: October 15, 1991
    Assignee: Northwest Screen Systems Co.
    Inventors: Alan D. Puder, Carl W. Sims, Louis R. Hudoba
  • Solvent handling system
    Patent number: 4994180
    Abstract: An improved solvent handling system for use with a liquid chromatograph is disclosed in which a manifold allows a source of pressurized gas to communicate with a plurality of solvent vessels. Individual check valves prevent return flow into the manifold and cross flow between the solvent vessels. A pressure equalization system is also provided for equalizing the pressure between each solvent vessel and the corresponding supply conduit. An individually manually operated vent is provided for sparging and pressure release.
    Type: Grant
    Filed: February 1, 1990
    Date of Patent: February 19, 1991
    Assignee: Systec, Inc.
    Inventors: Carl W. Sims, Louis R. Hudoba