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:
Apr. 14, 2015
Filed:
May. 09, 2011
Shinichi Mukoyama, Tokyo, JP;
Masashi Yagi, Tokyo, JP;
Tomoya Nomura, Tokyo, JP;
Shuka Yonemura, Chiba, JP;
Shinichi Mukoyama, Tokyo, JP;
Masashi Yagi, Tokyo, JP;
Tokui Yonemura, Chiba, JP;
Tomoya Nomura, Tokyo, JP;
Furukawa Electric Co., Ltd., Tokyo, JP;
International Superconductivity Technology Center, Tokyo, JP;
Abstract
An AC superconducting cable with an insulating layer on the external circumference of a conductor, and wherein: the insulating layer includes a first insulating layer, a second insulating layer and a third insulating layer, from the inside layer to the outside layer; the insulating layer is impregnated with liquid nitrogen; the product of the dielectric constant ∈of the first insulating layer and the dielectric loss tangent tan δand the product of the dielectric constant ∈of the second insulating layer and the dielectric loss tangent tan δfulfilling the relationship ∈×tan δ×tan δ; and the product of the dielectric constant ∈of the second insulating layer and the dielectric loss tangent tan δand the product of the dielectric constant ∈of the third insulating layer and the dielectric loss tangent tan δfulfilling the relationship ∈×tan δ×tan δ