Patents by Inventor Darrell Fisher

Darrell Fisher 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).

  • RADIOTHERAPY GEL AND METHOD OF PREPARING THE SAME
    Publication number: 20250099630
    Abstract: A radioactive thermogel suspension, including a thermogel and a plurality of insoluble radioactive isotope phosphate particles, such as yttrium phosphate, suspended in the thermogel. The thermogel is PLGA-g-PEG. The thermogel contains less than 65 ppm stannous octanoate. The plurality of radioactive yttrium phosphate particles are between 0.03.Math.m and 10.Math.m in diameter. The plurality of radioactive yttrium phosphate particles are generally spherical. The YPO.sub.4 particle concentration is in the range of 3 mg/ml to 100 mg/ml.
    Type: Application
    Filed: December 9, 2024
    Publication date: March 27, 2025
    Inventors: David Swanberg, James Duncan, Darrell Fisher
  • Radiotherapy gel and method of preparing the same
    Patent number: 12201703
    Abstract: A radioactive thermogel suspension, including a thermogel and a plurality of insoluble radioactive isotope phosphate particles, such as yttrium phosphate, suspended in the thermogel. The thermogel is PLGA-g-PEG. The thermogel contains less than 65 ppm stannous octanoate. The plurality of radioactive yttrium phosphate particles are between 0.03 ?m and 10 ?m in diameter. The plurality of radioactive yttrium phosphate particles are generally spherical. The YPO4 particle concentration is in the range of 3 mg/ml to 100 mg/ml.
    Type: Grant
    Filed: January 9, 2023
    Date of Patent: January 21, 2025
    Assignee: Vivos, Inc.
    Inventors: David Swanberg, James Duncan, Darrell Fisher
  • RADIOTHERAPY GEL AND METHOD OF PREPARING THE SAME
    Publication number: 20230263913
    Abstract: A radioactive thermogel suspension, including a thermogel and a plurality of insoluble radioactive isotope phosphate particles, such as yttrium phosphate, suspended in the thermogel. The thermogel is PLGA-g-PEG. The thermogel contains less than 65 ppm stannous octanoate. The plurality of radioactive yttrium phosphate particles are between 0.03 µm and 10 µm in diameter. The plurality of radioactive yttrium phosphate particles are generally spherical. The YPO4 particle concentration is in the range of 3 mg/ml to 100 mg/ml.
    Type: Application
    Filed: January 9, 2023
    Publication date: August 24, 2023
    Inventors: David Swanberg, James Duncan, Darrell Fisher
  • Rhodium/inorganic iodide catalyst system for methanol carbonylation process with improved impurity profile
    Patent number: 6323364
    Abstract: The method of the present invention provides an improvement upon prior art methanol carbonylation methods which substantially reduces the production of carbonyl impurities. The production of carbonyl impurities, particularly acetaldehyde, crotonaldehyde, and 2-ethyl crotonaldehyde, in methanol carbonylation reactions has been found to decrease by maintaining less than about 4.5 wt % methyl iodide in the reaction medium during the course of the reaction.
    Type: Grant
    Filed: August 31, 1999
    Date of Patent: November 27, 2001
    Assignee: Celanese International Corporation
    Inventors: Pramod Agrawal, Hung-Cheun Cheung, Darrell A. Fisher, Valerie Santillan, Mark O. Scates, Elaine C. Sibrel, G. Paul Torrence