Patents by Inventor William L. Norrell

William L. Norrell 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: 4546625
    Abstract: An improved dry cleaning machine of the type utilizing powdered cleaning agents and having a rotating drum. Such machines have a shroud which completely surrounds the rotating drum and the shroud is connected to a collector and to the intake of an air blower. The draperies, furs, or the like are to be cleaned are rotated in the drum with the powdered cleaning agent for a predetermined amount of time after which the air blower is turned on and the cleaning agents are evacuated from the drum and deposited in the collector. The improved machine has a plurality of spring loaded plates over various groups of openings through the side of the drum.
    Type: Grant
    Filed: July 30, 1984
    Date of Patent: October 15, 1985
    Inventor: William L. Norrell