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. 08, 1984
Filed:
Jun. 09, 1981
Applicant:
Inventor:
Roy T Martin, Kingston-Upon-Thames, GB;
Assignee:
Walter Kidde & Co., Inc., Wake Forest, NC (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
A62C / ; A62C / ; A62C / ; A62C / ; A62D / ;
U.S. Cl.
CPC ...
169 45 ; 169 66 ; 252-3 ; 252-805 ; 252307 ; 252605 ;
Abstract
A method of purging an enclosed space of an explosive or combustible gas or vapor comprises filling the space with a foam the bubbles of which are filled with a preprepared gaseous mixture of air and a non-toxic fire-suppressant gas, such as bromotrifluoromethane, in predetermined proportions and allowing the foam to decay. The proportions of air and said fire-suppressant gas in the gaseous mixture are such that when the foam decays the gaseous mixture remaining in the tank and freed by the decay of the foam is capable of supporting human life.