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. 19, 2004
Filed:
Oct. 31, 2002
Applicant:
Inventors:
Roko S. Bujas, Leucadia, CA (US);
Ralf Dunkel, San Diego, CA (US);
Assignee:
General Atomics, San Diego, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N 1/508 ;
U.S. Cl.
CPC ...
G01N 1/508 ;
Abstract
Method and apparatus for testing ultralow moisture permeation through a sample such as a thin barrier film by exposing one surface of a sample to be tested for moisture permeation to a predetermined humidity of HTO. The HTO permeating therethrough is collected in a stream of dry gas, preferably methane, at a known flow rate, and monitored for its radioactivity content. Monitoring over a period of time and appropriate conversion allows accurate assessment of even permeation rates measured as very low fractions of a gram of water per square meter per day.