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:
Jan. 05, 2010
Filed:
Oct. 30, 2004
Applicant:
Heike Hilgers, Bergisch Gladbach, DE;
Inventor:
Heike Hilgers, Bergisch Gladbach, DE;
Assignee:
Inficon GmbH, , DE;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01M 3/04 (2006.01);
U.S. Cl.
CPC ...
Abstract
For operating a hydrogen test leak unit including a chamber defined by a membrane, a test gas mixture of hydrogen and an added gas is used. The added gas has a permeation coefficient relative to the material of the membrane ranging between 50% and 200% of that of hydrogen. In this manner, demixing of the test gas mixture is limited and significant concentration variations in the chamber are prevented. Preferably, helium is used as added gas.
Quick Actions:
Hilgers, Heike. (2010). Method for operating a hydrogen test leak unit (U.S. Patent No. 7640790). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7640790
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