Patents Assigned to Nok Kluber Company Ltd.
  • Lubricating oil for use under radioactive or energy irradiation conditions
    Patent number: 5192457
    Abstract: A finely pulverized alkaline earth metal oxide or an alkali metal oxide is added to perfluoropolyether oil represented by the general formula Rf[CF(CF.sub.3)CF.sub.2 O].sub.5.about.60 Rf, to absorb HF generated by decomposition of the perfluoropolyether at radioactive or energy irradiation of the perfluoropolyether oil, thereby effectively suppressing diffusion of HF into the oil or the gas phase.
    Type: Grant
    Filed: March 9, 1992
    Date of Patent: March 9, 1993
    Assignee: Nok Kluber Company Ltd.
    Inventor: Jun Nishimura