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:
Sep. 18, 2012
Filed:
May. 14, 2007
Kazuhide Tanaka, Hitachi, JP;
Masaya Takahashi, Hitachinaka, JP;
Michiya Okada, Mito, JP;
Hideki Abe, Tsukuba, JP;
Motoharu Imai, Kashiwa, JP;
Kazuhide Tanaka, Hitachi, JP;
Masaya Takahashi, Hitachinaka, JP;
Michiya Okada, Mito, JP;
Hideki Abe, Tsukuba, JP;
Motoharu Imai, Kashiwa, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An object is to provide a liquid level sensor device for liquefied gas enabling measurement on a liquid level of liquefied gas having a boiling point in the vicinity of 21 K, e.g. liquid hydrogen, accurately and with good reproducibility and enabling simple production with good reproducibility. The present invention is a liquid level sensor device for liquefied gas including compound containing magnesium and boron arranged in succession in the longitudinal direction over the entire or a part of surface of a linear conductor made of metal and a portion of the compound thereof dipped in liquid is in a superconductive state at liquid level measurement.