Patents by Inventor Peter J. Chalmers

Peter J. Chalmers 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).

  • UV-absorbing compounds
    Patent number: 5637718
    Abstract: The invention provides UV-absorbing compounds of formula (I) ##STR1## and compositions, including sunscreens, containing compounds of formula (I).
    Type: Grant
    Filed: August 23, 1993
    Date of Patent: June 10, 1997
    Assignees: ICI Australia Operations Proprietary Ltd., Australian Institute of Marine Science
    Inventors: Graham Bird, Peter J. Chalmers, Neil Fitzmaurice, David J. Rigg, San H. Thang
  • Crystallization process
    Patent number: 5276188
    Abstract: The invention relates to the compound 2-[1-(ethoxyimino) propyl]-3-hydroxy-5-(3-butyryl-2,4,6-trimethylphenyl)-cyclohex-2-en-1-one in the form of an anhydrous crystalline powder and a process for the preparation of said anhydrous crystalline powder.
    Type: Grant
    Filed: November 26, 1991
    Date of Patent: January 4, 1994
    Assignee: ICI Australia Operations Proprietary Limited
    Inventors: Peter J. Chalmers, Andrew F. Kirby, Roger P. Heath