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. 09, 1999
Filed:
Aug. 15, 1997
Applicant:
Inventors:
Brian Thomas Sales, Dorking, GB;
Anthony Dennis Elgar, Mitcham, GB;
Robert Neal Bennett, Hextable, GB;
Assignee:
British Gas plc, London, GB;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F16L / ;
U.S. Cl.
CPC ...
138 93 ; 138 89 ;
Abstract
A method for blocking the bore of a pipe comprising moving an inflatable bag along the bore of the pipe from an access point in the pipe to a point where the bore is to be blocked, inflating the bag until it engages the internal wall of the pipe or main and causing the bag to maintain its inflated condition. Where an expandable foam is used.