The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 09, 1993
Filed:
Mar. 09, 1992
Applicant:
Inventor:
Jun Nishimura, Takahagi, JP;
Assignee:
Nok Kluber Company Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C10M / ; C10M / ;
U.S. Cl.
CPC ...
252 25 ; 252 54 ;
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.