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, 1994
Filed:
May. 12, 1992
Leybold Aktiengesellschaft, Hanau, DE;
Abstract
An apparatus for determining the concentration of a gas in a vacuum chamber is described. Internal to the vacuum chamber are one or more cathodes. The chamber is fed via a gas inlet and is connected to a separate measurement chamber for accommodating a measuring device via a connecting line between the two chambers. The connecting line in conjunction with a pumping means produces a pressure gradient between the interior of the vacuum chamber and the interior of the measurement chamber. One end of the connecting line, located within the vacuum chamber terminates directly in the central region of a cathode surfaces facing the interior of the chamber, and the length, as well as the cross section of the connecting line being dimensioned so that the pressure gradient between the interior of the vacuum chamber and the interior of the measurement chamber, is precisely that required for measurement.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile