Patents by Inventor Barton L. Bergquist

Barton L. Bergquist 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).

  • Structural materials from recycled high density polyethylene and herbaceous fibers, and method for production
    Patent number: 5194461
    Abstract: A composite useful for structural components comprised of recycled high density polyethylene and herbaceous fibrous materials and a method to produce composites based on recycled high density polyethylene and chopped herbaceous fibers. An alternative structural composite is disclosed which is comprised of recycled low density polyethylene and chopped herbaceous fibrous material.
    Type: Grant
    Filed: June 26, 1991
    Date of Patent: March 16, 1993
    Assignee: University of Northern Iowa Foundation
    Inventors: Barton L. Bergquist, Mohammed F. Fahmy
  • Low toxicity radiation sensitizer
    Patent number: 4569932
    Abstract: This invention relates to cisplatin type fluorescently labeled compounds. In particular, the compounds are bis (5-aminofluorescein)-dichloroplatinum (II) or certain substituted analogues thereof. The compounds are useful as radiation sensitivity enhancers and as fluorescent biological tracers. The invention also relates to a unique, single step synthesis for preparing said compounds.
    Type: Grant
    Filed: March 5, 1984
    Date of Patent: February 11, 1986
    Assignee: University of Northern Iowa Foundations
    Inventors: Barton L. Bergquist, James C. Chang
  • Low toxicity radiation sensitizer
    Patent number: 4490543
    Abstract: Bis(5-aminofluorescein)dichloroplatinum(II), and substituted fluoresceinamine derivatives of this compound are disclosed as highly effective radiation sensitizers which enhance the effect of ionizing radiation on tumor cells, but uniquely do so without the usual accompanying high toxicity level to surrounding normal cells. A direct combination, single step reaction synthesis is disclosed for preparing bis(5-aminofluorescein)dichloroplatinum(II) from the reaction between an alkali metal tetrachloroplatinate(II) and 5-aminofluorescein.
    Type: Grant
    Filed: November 12, 1982
    Date of Patent: December 25, 1984
    Assignee: University of Northern Iowa Foundation
    Inventors: Barton L. Bergquist, James C. Chang