Patents by Inventor John Sebastian Knowland

John Sebastian Knowland 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).

  • Ultraviolet light screening compositions
    Patent number: 8642019
    Abstract: A UV screening composition comprises particles which are capable of absorbing UV light so that electrons and positively charged holes are formed within the particles. The particles are adapted to minimize migration to the surface of the particles of the electrons and/or the positively charged holes when the particles are exposed to UV light in an aqueous environment.
    Type: Grant
    Filed: February 9, 2005
    Date of Patent: February 4, 2014
    Assignee: Isis Innovation Limited
    Inventors: John Sebastian Knowland, Peter James Dobson, Gareth Wakefield
  • Ultraviolet light screening compositions
    Patent number: 6869596
    Abstract: A UV screening composition comprising particles which are capable of absorbing UV light so that electrons and positively charged holes are formed within the particles, characterised in that the particles are adapted to minimise migration to the surface of the particles of the electrons and/or the positively charged holes when said particles are exposed to UV light in an aqueous environment.
    Type: Grant
    Filed: May 27, 1999
    Date of Patent: March 22, 2005
    Assignee: ISIS Innovation Limited
    Inventors: John Sebastian Knowland, Peter James Dobson, Gareth Wakefield
  • Particle comprising a host lattice and a guest, its preparation and use in ultraviolet light screening compositions
    Publication number: 20030138386
    Abstract: A UV screening composition comprising particles which are capable of absorbing UV light so that electrons and positively charged holes are formed within the particles, characterised in that the particles are adapted to minimise migration to the surface of the particles of the electrons and/or the positively charged holes when said particles are exposed to UV light in an aqueous environment.
    Type: Application
    Filed: September 30, 2002
    Publication date: July 24, 2003
    Inventors: John Sebastian Knowland, Peter James Dobson, Gareth Wakefield