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. 01, 2005
Filed:
May. 04, 2001
Leonid N. Shekhter, Newton, MA (US);
Terrance B. Tripp, Westboro, MA (US);
Leonid L. Lanin, Belmont, MA (US);
Anastasia M. Conlon, Canton, MA (US);
Howard V. Goldberg, Framingham, MA (US);
Leonid N. Shekhter, Newton, MA (US);
Terrance B. Tripp, Westboro, MA (US);
Leonid L. Lanin, Belmont, MA (US);
Anastasia M. Conlon, Canton, MA (US);
Howard V. Goldberg, Framingham, MA (US);
H. C. Starck Inc., Newton, MA (US);
Abstract
High purity refractory metals, valve metals, refractory metal oxides, valve metal oxides, or alloys thereof suitable for a variety of electrical, optical and mill product/fabricated parts usages are produced from their respective oxides by metalothermic reduction of a solid or liquid form of such oxide using a reducing agent that establishes (after ignition) a highly exothermic reaction, the reaction preferably taking place in a continuously or step-wise moving oxide such as gravity fall with metal retrievable at the bottom and an oxide of the reducing agent being removable as a gas or in other convenient form and unreacted reducing agent derivatives being removable by leaching or like process.