Patents Examined by John Bergero
  • Heat exchangers in sapphire processing
    Patent number: 9945613
    Abstract: Systems and methods are presented for efficient heating during production of corundum. One embodiment takes the form of a system for processing corundum including a first furnace and a second furnace. The first and second furnaces are sequentially arranged and heat from the first furnace is subsequently used to heat the second furnace.
    Type: Grant
    Filed: September 20, 2012
    Date of Patent: April 17, 2018
    Assignee: APPLE INC.
    Inventors: Christopher D. Prest, Dale N. Memering