Patents Assigned to Cryodyne Technologies, Inc.
  • Method of purification of acetonitrile
    Patent number: 5426208
    Abstract: Acetonitrile is purified by treatment with ozone. After ozone treatment is ended, acetonitrile is passed through packed columns of molecular sieve, activated alumina and charcoal or graphitized carbon; the process results in virtually pure acetonitrile obtained at an efficiency unachievable by prior art processes.
    Type: Grant
    Filed: November 19, 1993
    Date of Patent: June 20, 1995
    Assignee: Cryodyne Technologies, Inc.
    Inventors: Barry W. Himes, R. Clive Greenough
  • Method for purification of acetonitrile
    Patent number: 5292919
    Abstract: Acetonitrile is purified by treatment with ozone. After ozone treatment is ended, acetonitrile is passed through packed columns of molecular sieve, activated alumina and charcoal or graphitized carbon; the process results in virtually pure acetonitrile obtained at an efficiency unachievable by prior art processes.
    Type: Grant
    Filed: May 21, 1993
    Date of Patent: March 8, 1994
    Assignee: Cryodyne Technologies, Inc.
    Inventors: Barry W. Himes, R. Clive Greenough