Method and apparatus for repairing ruptures in underground conduits
CA 2059643 C · Owner: Barton, Kenneth S. · Inventors: Barton, Kenneth S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus and method are disclosed for repairing ruptures in underground conduits. An inflatable bladder (52) and a flexible sleeve (72) that is wrapped about at least a portion of the bladder are introduced into a conduit (10) proximate a rupture (30) therein. The bladder is inflated to urge the sleeve into engagement with the conduit (10) such that the sleeve covers the rupture. The sleeve includes an adhesive bonding substance that adheres the sleeve to the conduit and is hardenable to bond the sleeve to the conduit.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed August 23, 1990 and granted December 29, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 23, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 23, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.