Patents Assigned to Robert D. Stevens
  • Mixture of three refrigerants
    Patent number: 4510064
    Abstract: A novel azeotropic mixture of the refrigerants R12, R22 and R142b in which a higher operating temperature and a lower operating pressure are attained than are attainable by any of the refrigerants of the mixture.
    Type: Grant
    Filed: February 13, 1984
    Date of Patent: April 9, 1985
    Assignee: Robert D. Stevens
    Inventor: Boris Ermak