Patent ID: 7537007

Claim:
A method of preventing fires resulting from the use of oxygen delivery systems in proximity to ignition sources and combustible materials, said method comprising the steps of a) preparing a blend of oxygen and inert gas components of sufficient heat capacity to prevent ignition of combustibles in its region of release, b) disposing said blend within an oxygen delivery container with delivery apparatus, and c) administering said blend to a recipient through said delivery apparatus, said blend comprising a composition of gases having an oxygen/nitrogen/perfluoropropane/sulfur hexafluoride/dodecafluoro-2-methylpentan-3-one volumetric ratio selected from the group consisting of: 44.5/0/54.5/0/0, 52.0/0/48.0/0/0, 31.2/38.8/30.0/0/0, 39.0/31.0/30.0/0/0, 31.2/0/0/64.8/0, 41.5/0/0/58.5/0, 40.8/0/30.0/29.2/0, 48.0/0/30.0/22.0/0, 49.4/0/40.6/0/10.0, 56.6/0/33.4/0/10.0, 41.1/0/0/48.9/10.0, and 48.5/0/0/41.5/10.0.