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:
Oct. 17, 1995
Filed:
Dec. 07, 1994
Takashi Ishigami, Yokohama, JP;
Minoru Obata, Inagi, JP;
Mituo Kawai, Yokohama, JP;
Michio Satou, Yokohama, JP;
Takashi Yamanobe, Yokohama, JP;
Toshihiro Maki, Yokohama, JP;
Noriaki Yagi, Yokohama, JP;
Shigeru Ando, Hiratsuka, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
This is a highly purified metal comprising one metal selected from the group consisted of titanium, zirconium and hafnium. The highly purified metal has an Al content of not more than 10 ppm. It also has an oxygen content of more than 250 ppm, each of Fe, Ni and Cr contents not more than 10 ppm and each of Na and K contents not more than 0.1 ppm. The highly purified metal is obtained by either purifying crude metal by the iodide process or surface treating crude metal to remove a contaminated layer existing on the surface thereof and then melting The surface treated material with electron bean in a high vacuum.