Patents by Inventor Graham Paul Dransfield

Graham Paul Dransfield 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).

  • Particulate metal oxide
    Patent number: 7503970
    Abstract: A particulate metal oxide having the mean length of the primary particles in the range from 50 to 90 nm, the mean width of the primary particles in the range from 5 to 20 nm, and the median volume particle diameter of the secondary particles is less than 45 nm. The metal oxide can be used in a sunscreen product that exhibits both effective UV protection and improved transparency.
    Type: Grant
    Filed: April 13, 2007
    Date of Patent: March 17, 2009
    Assignee: Croda International PLC
    Inventors: Graham Paul Dransfield, Susan Cutter, Phillip Laurence Lyth
  • Particulate metal oxide
    Patent number: 7220305
    Abstract: A particulate metal oxide having the mean length of the primary particles in the range from 50 to 90 nm, the mean width of the primary particles in the range from 5 to 20 nm, and the median volume particle diameter of the secondary particles is less than 45 nm. The metal oxide can be used in a sunscreen product that exhibits both effective UV protection and improved transparency.
    Type: Grant
    Filed: November 4, 2005
    Date of Patent: May 22, 2007
    Assignee: Croda International PLC
    Inventors: Graham Paul Dransfield, Susan Cutter, Phillip Lawrence Lyth
  • Particulate metal oxide
    Patent number: 7101427
    Abstract: A particulate metal oxide having a mean length of the primary particles in the range from 50 to 90 nm, the mean width of the primary particles in the range from 5 to 20 nm, and the median volume particle diameter of the secondary particles is less than 45 nm. The metal oxide can be used in a sunscreen product that exhibits both effective UV protection and improved transparency.
    Type: Grant
    Filed: December 20, 2002
    Date of Patent: September 5, 2006
    Assignee: Imperial Chemical Industries plc
    Inventors: Graham Paul Dransfield, Susan Cutter, Philip Laurence Lyth
  • Particulate metal oxide
    Publication number: 20030223940
    Abstract: A particulate metal oxide having a mean length of the primary particles in the range from 50 to 90 nm, the mean width of the primary particles in the range from 5 to 20 nm, and the median volume particle diameter of the secondary particles is less than 45 nm. The metal oxide can be used in a sunscreen product that exhibits both effective UV protection and improved transparency.
    Type: Application
    Filed: December 20, 2002
    Publication date: December 4, 2003
    Applicant: Imperial Chemical Industrial PLC
    Inventors: Graham Paul Dransfield, Susan Cutter, Philip Laurence Lyth