Patents by Inventor Peter Karl Ferdinand Limbach

Peter Karl Ferdinand Limbach 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).

  • Coated aluminium workpiece
    Patent number: 6905775
    Abstract: Aluminium alloy sheet having on a surface anodic oxide film and an overlying coating consisting essentially of at least one adhesion promoter excluding silanes. Sheet for architectural use carries a paint layer over the adhesion promoter coating. Sheet for automobile use may carry an electroconductive paint primer layer over the adhesion promoter coating. Preferred adhesion promoters are polyacrylic acid and pretreatments containing Cr, Mn, Mo, Si, Ti, Zr and F values.
    Type: Grant
    Filed: October 13, 1998
    Date of Patent: June 14, 2005
    Assignee: Novelis Inc.
    Inventors: Eric Barlow, Mark Foster, Chris Pargeter, Peter Karl Ferdinand Limbach
  • Aluminium sheet with rough surface
    Patent number: 6524768
    Abstract: Aluminium sheet suitable for use as a lithographic plate support has a surface that is uniformly rough by virtue of: a rippled topography having an aspect ratio of at least 1.3 on a sale of 5-200 &mgr;m; and a superimposed pitted structure on a scale of 1-20 &mgr;m. A method of making the aluminium sheet involves pack rolling two aluminium ribbons to generate facing surfaces having the transverse rippled structure; followed by a small amount of a conventional roughening or graining treatment to develop the pitted structure.
    Type: Grant
    Filed: September 3, 1999
    Date of Patent: February 25, 2003
    Assignee: Alcan International Limited
    Inventors: Peter Karl Ferdinand Limbach, Martin Philip Amor, Jonathan Ball
  • 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
  • Aluminium sheet with rough surface
    Patent number: 5998044
    Abstract: Aluminium sheet suitable for use as a lithographic plate support has a surface that is uniformly rough by virtue of a rippled topography having an aspect ratio of at least 1.3 on a ale of 5-200 .mu.m and a superimposed pitted surface on a scale of 1-20 .mu.m.
    Type: Grant
    Filed: May 20, 1996
    Date of Patent: December 7, 1999
    Assignee: Alcan International Limited
    Inventors: Peter Karl Ferdinand Limbach, Martin Philip Amor, Jonathan Ball