Patents by Inventor Joan L. Henricus

Joan L. Henricus 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).

  • Waste toner detection systems and methods for determining the volume of waste toner in a printer cartridge
    Patent number: 6505009
    Abstract: System and methods for sensing a condition of a printer cartridge waste volume. In one embodiment the system provides notification when a printer cartridge needs to be replaced. The system includes a printer, a printer cartridge for the printer having a waste volume, and a sensor operably coupled with the printer cartridge for sensing the waste volume in the printer cartridge.
    Type: Grant
    Filed: June 5, 2001
    Date of Patent: January 7, 2003
    Assignee: Hewlett-Packard Company
    Inventors: Joan L. Henricus, Ryan H. Kolodziej
  • WASTE TONER DETECTION SYSTEMS AND METHODS FOR DETERMINING THE VOLUME OF WASTE TONER IN A PRINTER CARTRIDGE
    Publication number: 20020181962
    Abstract: System and methods for sensing a condition of a printer cartridge waste volume. In one embodiment the system provides notification when a printer cartridge needs to be replaced. The system comprises a printer, a printer cartridge for the printer having a waste volume, and a sensor operably coupled with the printer cartridge for sensing the waste volume in the printer cartridge.
    Type: Application
    Filed: June 5, 2001
    Publication date: December 5, 2002
    Inventors: Joan L. Henricus, Ryan H. Kolodziej