Patents by Inventor Graeme John Marshall

Graeme John Marshall 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).

  • Aluminum alloy and extrusion
    Patent number: 8252128
    Abstract: A population of extrusion billets has a specification such that every billet is of an alloy of composition (in wt. %): Fe<0.35; Si 0.20-0.6; Mn<0.10; Mg 0.25-0.9; Cu<0.015; Ti<0.10; Cr<0.10; Zn<0.03; balance Al of commercial purity. After ageing to T5 or T6 temper, extruded sections can be etched and anodised to give extruded matt anodised sections having improved properties.
    Type: Grant
    Filed: March 14, 2008
    Date of Patent: August 28, 2012
    Assignee: Alcan International Limited
    Inventors: Nicholas Charles Parson, Barry Roy Ellard, Graeme John Marshall
  • Aluminium alloy and extrusion
    Publication number: 20080163960
    Abstract: A population of extrusion billets has a specification such that every billet is of an alloy of composition (in wt. %): Fe<0.35; Si 0.20-0.6; Mn<0.10; Mg 0.25-0.9; Cu<0.015; Ti<0.10; Cr<0.10; Zn<0.03; balance Al of commercial purity. After ageing to T5 or T6 temper, extruded sections can be etched and anodised to give extruded matt anodised sections having improved properties.
    Type: Application
    Filed: March 14, 2008
    Publication date: July 10, 2008
    Inventors: Nicholas Charles Parson, Barry Roy Ellard, Graeme John Marshall
  • AA6000 aluminum sheet method
    Patent number: 6652678
    Abstract: A method of converting an ingot of a 6000 series aluminium alloy to self-annealing sheet, comprises subjecting the ingot to a two-stage homogenisation treatment, first at at least 560° C. and then at 450° C. to 480° C., then hot rolling the homogenised ingot at a starting hot roll temperature of 450° C. to 480° C. and a finishing hot roll temperature of 320° C. to 360° C. The resulting hot rolled sheet has an unusually low Cube recrystallisation component.
    Type: Grant
    Filed: October 31, 2001
    Date of Patent: November 25, 2003
    Assignee: Alcan International Limited
    Inventors: Graeme John Marshall, Karl Albert Herbst, Martin Heinze, Richard Hamerton
  • Aluminium alloy and extrusion
    Publication number: 20020112797
    Abstract: A population of extrusion billets has a specification such that every billet is of an alloy of composition (in wt. %): Fe <0.35; Si 0.20-0.6; Mn <0.10; Mg 0.25-0.9; Cu <0.015; Ti <0.10; Cr <0.10; Zn <0.03; balance Al of commercial purity. After ageing to T5 or T6 temper, extruded sections can be etched and anodized to give extruded matt anodized sections having improved properties.
    Type: Application
    Filed: February 1, 2002
    Publication date: August 22, 2002
    Inventors: Nicholas Charles Parson, Barry Roy Ellard, Graeme John Marshall
  • Aluminium alloy and extrusion
    Patent number: 6375767
    Abstract: A population of extrusion billets has a specification such that every billet is of an alloy of composition (in wt. %) : Fe<0.35; Si 0.20-0.6; Mn<0.10; Mg 0.25-0.9; Cu<0.015; Ti<0.10; Cr<0.10; Zn<0.03; balance Al of commercial purity. After ageing to T5 or T6 temper, extruded sections can be etched and anodized to give extruded matte anodized sections having improved properties.
    Type: Grant
    Filed: September 4, 1998
    Date of Patent: April 23, 2002
    Assignee: Alcan International Limited
    Inventors: Nicholas Charles Parson, Barry Roy Ellard, Graeme John Marshall
  • Aluminium alloy brazing sheet
    Patent number: 6019939
    Abstract: Aluminum brazing alloy composition is (in wt. %): Mn 0.7-1.5, Cu 0.5-1.0, Fe not more than 0.4, Si not more than 0.15, Mg up to 0.8, V and/or Cr up to 0.3, Ti up to 0.1, others up to 0.05 each, 0.15 total, balance A1 of at least commercial purity. Improved properties include: post-brazed strength and sag resistance; corrosion resistance; ability to withstand interannealing and some homogenization.
    Type: Grant
    Filed: November 28, 1995
    Date of Patent: February 1, 2000
    Assignee: Alcan International Limited
    Inventors: Alan Gray, Graeme John Marshall, Alan John Ernest Flemming