Patents by Inventor Jo Pritchard

Jo Pritchard 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).

  • Optical sensor for the measurement of pH in a fluid, and related sensing compositions and methods
    Patent number: 5607644
    Abstract: An optical sensor is provided for measuring the pH of a fluid sample. The sensor is formulated using a fluorescent polymer composition comprising a copolymer of a water-dispersable, polyether-containing urethane olefin precursor and a fluorescent monomer species, wherein the ratio of precursor and fluorescent monomer species is such that a predetermined apparent pKa is provided. The sensor is prepared by coating the distal end of an optical waveguide with the fluorescent polymer composition, and curing the copolymer contained in the composition, e.g., by exposure to radiation of a suitable wavelength.
    Type: Grant
    Filed: June 10, 1993
    Date of Patent: March 4, 1997
    Assignee: Optical Sensors Incorporated
    Inventors: Alan Olstein, William Fowler, Jo Pritchard
  • Fluorescent polymers useful in conjunction with optical PH sensors
    Patent number: 5536783
    Abstract: An optical sensor is provided for measuring the pH of a fluid sample. The sensor is formulated using a fluorescent polymer composition comprising a copolymer of a water-dispersable, polyether-containing urethane olefin precursor and a fluorescent monomer species, wherein the ratio of precursor and fluorescent monomer species is such that a predetermined apparent pKa is provided. The sensor is prepared by coating the distal end of an optical waveguide with the fluorescent polymer composition, and curing the copolymer contained in the composition, e.g., by exposure to radiation of a suitable wavelength.
    Type: Grant
    Filed: May 30, 1995
    Date of Patent: July 16, 1996
    Assignee: Optical Sensors Incorporated
    Inventors: Alan Olstein, William Fowler, Jo Pritchard