Patents by Inventor Laurent Calaque

Laurent Calaque 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).

  • Patent number: 6454832
    Abstract: A manufacturing process for an intermediate product made of a predetermined 7000 series alloy having a target content of at least one first anti-recrystallizing element Z1 selected from the group consisting of Zr and Cr. This process enables effective recycling of scrap, particularly machining scrap made of 7000 series alloys, in the manufacture of intermediated products with high added value.
    Type: Grant
    Filed: November 13, 2000
    Date of Patent: September 24, 2002
    Assignee: Pechiney Rhenalu
    Inventors: Jean-Francois Verdier, Michel Leroy, Laurent Calaque
  • Patent number: 6293990
    Abstract: A manufacturing process for an intermediate product made of a predetermined 7000 series alloy having a target content of at least one first anti-recrystallizing element Z1 selected from the group consisting of Zr and Cr. The product is produced by the steps of: a) supplying machining scrap including at least one second 7000 series alloy having a target content of at least one second anti-recrystallizing element Z2 selected from the group consisting of Zr and Cr, in an amount greater than a maximum accepted content of Z2 in the predetermined alloy; b) conducting at least one refining step of said scrap to reduce the amount of Z2 to a value below the maximum accepted content of Z2 in the predetermined alloy; c) producing a batch of liquid metal having nominal composition, in part or in whole, from the refined scrap; and d) forming the product by casting the liquid metal.
    Type: Grant
    Filed: January 10, 2000
    Date of Patent: September 25, 2001
    Assignee: Pechiney Rhenalu
    Inventors: Jean-Francois Verdier, Michel Leroy, Laurent Calaque