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:
Jun. 22, 2010
Filed:
May. 08, 2006
Fumio Watanabe, Ibaraki, JP;
Reiki Watanabe, Ibaraki, JP;
Fumio Watanabe, Ibaraki, JP;
Reiki Watanabe, Ibaraki, JP;
Mori Patent Office, Tokyo, JP;
Abstract
An ionization vacuum gauge which has at least three electrodes of a grid (), an electron source () and an ion collector () in a vacuum vessel () connected in communication with a vacuum apparatus, oscillates electrons emitted front the electron source () within and outside of the grid (), ionizes gas molecules flying into the grid () by the oscillated electrons, supplements the ionized ions by the ion collector () to convert into a current signal, and measures a gas molecular density (pressure) in the vacuum apparatus according to the obtained current intensity, wherein the ion collector () is provided with a heating device for heating the ion collector.