Patents by Inventor Warren E. Hall

Warren E. Hall 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).

  • Purification of X-ray contrast agent, magnetic resonance imaging agent, or radiopharmaceuticals using reverse osmosis
    Patent number: 5221485
    Abstract: The use of reverse osmosis as an alternative or substitute method for the purification of a crude diagnostic agent. X-ray contrast agent, magnetic resonance imaging agent, or radiopharmaceuticals are purified by passing through a cross-linked reverse osmosis membrane.
    Type: Grant
    Filed: October 2, 1992
    Date of Patent: June 22, 1993
    Assignee: Mallinckrodt Medical, Inc.
    Inventors: Mark E. Bosworth, Thomas J. Dunn, Warren E. Hall, Richard G. Johnson, Mills T. Kneller, Youlin Lin, Rebecca A. Wallace, David H. White, David M. Wong
  • Purification of crude Ioversol using reverse osmosis
    Patent number: 5160437
    Abstract: The use of reverse osmosis as an alternative or substitute method for the purification of a crude diagnostic agent. In the purification process a crude Ioversol solution is contacted with a cross-linked membrane under pressure, forcing the low molecular weight impurities within the crude Ioversol solution through the membrane pores and retaining Ioversol molecules.
    Type: Grant
    Filed: December 3, 1991
    Date of Patent: November 3, 1992
    Assignee: Mallinckrodt Medical, Inc.
    Inventors: Mark E. Bosworth, Thomas J. Dunn, Warren E. Hall, Richard G. Johnson, Mills T. Kneller, Youlin Lin, Rebecca A. Wallace, David H. White, David M. Wong
  • Umbrella shelter
    Patent number: 4086931
    Abstract: A rectangular umbrella has its supporting pole positioned at the middle of the back edge so as not to obstruct the space under the umbrella. A vertical sheet of fabric hangs from the back edge and portions of the side edges of the umbrella. This partial enclosure is completed by a removable front panel having a transparent upper portion and attachment means for connection with the umbrella and forward side edges of said vertical back fabric. The umbrella pole may be mounted on a stadium bench for sports spectators, on a boat seat for fishermen or duck hunters, or thrust into the ground for bird and big game hunters.
    Type: Grant
    Filed: June 3, 1977
    Date of Patent: May 2, 1978
    Assignee: Sports-Brella Inc.
    Inventor: Warren E. Hall