Patents by Inventor Nigel Cleaton Davies

Nigel Cleaton 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).

  • Aluminium workpiece
    Patent number: 6368483
    Abstract: An aluminum workpiece, e.g. sheet for containerstock, having an anodic oxide film whose thickness varies from location to location on the surface, whereby interference contrast effects are visible on the surface. Aluminum foil having on a surface thereof an unsealed anodic oxide film 5-1000 nm thick which provides a clean surface with fretting resistance. A method of anodizing thin aluminum foil is also described.
    Type: Grant
    Filed: January 18, 2000
    Date of Patent: April 9, 2002
    Assignee: Alcan International Limited
    Inventors: Jonathan Ball, Nigel Cleaton Davies, Rodney Charles Jones, Eric Barlow
  • Cleaning aluminum workpieces
    Patent number: 5997721
    Abstract: A method of cleaning an Al workpiece comprises a.c. anodising the workpiece in an acidic electrolyte capable of dissolving aluminium oxide and maintained at a temperature of at least 70.degree. C. under conditions such that the surface of the workpiece is cleaned with any oxide film thereon being non-porous and no more than about 20 nm thick.
    Type: Grant
    Filed: October 16, 1997
    Date of Patent: December 7, 1999
    Assignee: ALCAN International Limited
    Inventors: Peter Karl Ferdinand Limbach, Armin Kumpart, Nigel Cleaton Davies, Jonathan Ball