Patents by Inventor Paul William Jeffrey

Paul William Jeffrey 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 products with high resistance to pitting corrosion
    Patent number: 6284386
    Abstract: Aluminum alloy products are described which combine both good strength and resistance to pitting corrosion. They are extruded from an aluminum alloy of the AA1000, AA3000 or AA8000 series containing about 0.001 to 0.3% zinc and about 0.001 to 0.03% titanium. The alloy may also contain 0.001 to 0.5% manganese and about 0.03 to 0.4% silicon. These products are particularly useful in the production of extruded products, such as heat exchanger tubing.
    Type: Grant
    Filed: September 14, 1998
    Date of Patent: September 4, 2001
    Assignee: Alcan International Limited
    Inventors: Paul William Jeffrey, Nicholas Charles Parson, Thiagarajan Ramanan, Clark Weaver