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:
Mar. 05, 2024
Filed:
Mar. 02, 2020
Airgas, Inc., Radnor, PA (US);
American Air Liquide, Inc., Fremont, CA (US);
L'air Liquide, Société Anonyme Pour L'etude ET L'exploitation Des Procédés Georges Claude, Paris, FR;
Tracey Jacksier, Landenberg, PA (US);
Mani C. Matthew, Neshanic Station, NJ (US);
Richard A. Socki, Newark, DE (US);
Jun Sonobe, Yokosuka, JP;
Megumi Isaji, Yokosuka, JP;
James McHale, Northampton, PA (US);
Airgas, Inc., Radnor, PA (US);
America Air Liquide, Inc., Fremont, CA (US);
L'Air Liquide, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude, Paris, FR;
Abstract
A quality control method for the preparation of dry compressed gas cylinder including passivating and/or preparing the compressed gas cylinder with the technique to be validated, filling the passivated/prepared compressed gas cylinder with gaseous carbon dioxide to a normal working pressure, wherein the gaseous carbon dioxide has a known δO isotope ratio, maintaining the pressurized gas cylinder at ambient temperature for a first predetermined period of time, and gradually emptying the pressurized gas cylinder, while simultaneously measuring the δO isotopic ratio, wherein a predetermined variation in the measured isotopic ratio of δO indicates a properly prepared cylinder.