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:
May. 25, 2004
Filed:
May. 16, 2003
Applicant:
Inventors:
Luca Pusterla, Milan, IT;
Robert Stimac, Palm Beach Gardens, FL (US);
Antonio Bonucci, Milan, IT;
Marco Succi, Milan, IT;
Assignee:
Saes Getters S.p.A., Milan, IT;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01D 5/944 ; H01J 4/900 ;
U.S. Cl.
CPC ...
B01D 5/944 ; H01J 4/900 ;
Abstract
A method for carrying out nitrogen analysis by ionization mobility spectroscopy at concentrations of few parts per billion (ppb) in argon is described. The method involves the addition of hydrogen in concentration of at least 5 ppb and lower than 100 parts per million (ppm) to the argon to be analyzed; the hydrogen addition step may be preceded by a purification operation of the argon flow to reduce the total concentration of impurities other than nitrogen to under 1 ppb.