Patents by Inventor David J. G. Davies

David J. G. Davies 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).

  • Cleaning and/or disinfection of contact lenses
    Patent number: 4863627
    Abstract: A contact lens disinfecting composition in solid form for addition to water comprises a contact lens disinfecting agent which is a source of hydrogen peroxide when in water, such as sodium percarbonate; an inactivating agent in delayed-release form such as sodium thiosulphate; and a color change indicator.
    Type: Grant
    Filed: December 9, 1986
    Date of Patent: September 5, 1989
    Assignee: University of Bath
    Inventors: David J. G. Davies, Brian J. Meakin, John E. Rees, John N. Staniforth
  • Disinfection of contact lenses
    Patent number: 4642234
    Abstract: Hydrophilic soft contact lenses are disinfected by soaking in a non-eye-irritant aqueous disinfecting solution obtained by the addition to tap water of a chlorhexidine salt, a sequestering agent for calcium and magnesium ions, and a dechlorinating agent. Suitably, the solution is obtained by dissolving a tablet in tap water. The preferred sequestering agent is sodium tripolyphosphate and the preferred dechlorinating agent is sodium thiosulphate. Advantageously, the chlorhexidine salt is provided in solid solution in urea to assist complete dissolution.
    Type: Grant
    Filed: May 14, 1985
    Date of Patent: February 10, 1987
    Assignee: University of Bath
    Inventors: David J. G. Davies, Brian J. Meakin, John E. Rees