Patents by Inventor Timothy D. Hanna

Timothy D. Hanna 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).

  • Solid liquid filtration apparatus and method
    Patent number: 7258784
    Abstract: A method and system for separating a particulate contaminate from a contaminated liquid medium involves filtering the contaminated liquid medium with a filter element having an afflux surface made of plastic particles that are sintered together. The contaminated liquid medium is introduced into a vessel, brought into contact with the filter element, where the liquid medium is separated from the particulate contaminant, and the separated liquid medium withdrawn from the filter element.
    Type: Grant
    Filed: June 10, 2003
    Date of Patent: August 21, 2007
    Assignee: Envirodyne Technologies, Inc.
    Inventors: David E. O'Ryan, Thomas P. Tripepi, Frank Schimmelmann, Timothy D. Hanna, Urs Herding
  • Solid liquid filtration apparatus and method
    Publication number: 20040251216
    Abstract: A method and system for separating a particulate contaminate from a contaminated liquid medium involves filtering the contaminated liquid medium with a filter element having an afflux surface made of plastic particles that are sintered together. The contaminated liquid medium is introduced into a vessel, brought into contact with the filter element, where the liquid medium is separated from the particulate contaminant, and the separated liquid medium withdrawn from the filter element.
    Type: Application
    Filed: June 10, 2003
    Publication date: December 16, 2004
    Inventors: David E. O'Ryan, Thomas P. Tripepi, Frank Schimmelmann, Timothy D. Hanna, Urs Herding
  • Alkali metal salts as surface treatments for fiberboard
    Patent number: 5603881
    Abstract: A process for the production of a wood composite, such as fiberboard, having improved surface characteristics includes the application of an alkali metal salt, e.g. an alkali metal carbonate. The process also reduces the amount and integrity of carbon film that generally forms in the die during consolidation, making the die significantly easier to clean.
    Type: Grant
    Filed: December 19, 1994
    Date of Patent: February 18, 1997
    Assignee: Masonite Corporation
    Inventor: Timothy D. Hanna
  • Method for the production of high density fiberboard
    Patent number: 4634498
    Abstract: High strength and high density wood fiberboard is formed by treating the wood fiber source material with a highly alkaline solution, such as sodium hydroxide solution, before interfelting the fibers into a loose mat. The wood source material may be treated after refining the material into fibers, but preferably, the wood source material is treated before fibrillation. Further, wood fiber source material may be partially neutralized before felting without substantial change in the resulting densities and strengths.
    Type: Grant
    Filed: December 31, 1984
    Date of Patent: January 6, 1987
    Assignee: United States Gypsum Company
    Inventors: Dennis L. Hardesty, Timothy D. Hanna, Frank J. Wendt, Kendall D. White, Jr.