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:
Feb. 07, 1989
Filed:
Mar. 16, 1988
Applicant:
Inventor:
Nobuo Yokoyama, Musashino, JP;
Assignee:
Nippon Oil Co., Ltd., Tokyo, JP;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H01B / ;
U.S. Cl.
CPC ...
252580 ; 568322 ; 568323 ; 568328 ;
Abstract
Novel halogenated naphthalene derivatives of the formula ##STR1## where X is F or Br, and a process for making the same are disclosed. Insulating oils are also disclosed which essentially comprise such a fluorine-containing compound and commonly used hydrocarbon insulating oils. The additive is highly conductive to improved dielectric constant, dielectric loss, hydrogen gas absorptivity, fluidity and viscosity characteristics.