Secondary containment system for manholes
CA 2070593 A1 · Owner: Mpc Containment Systems, Ltd. · Inventors: Reicin, Edward E.; Bertolozzi, Rano Joseph; Cortapassi, Theodore
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides secondary containment for liquid carrying equipment which is in a confined area. The invention is especially well suited for retrofitting manholes containing pumps for underground gasoline distributing systems. The pumps or other equipment are removed to expose pipes or wires entering the manhole. Then, plates are bolted around the pipes or wires to engage and support a bag made of a material which resists the attack of the liquid. Holes are cut in the bag to pass the pipes or wires. The bag is placed in the hole, expanded to approximately fill hole to rest on the, plates, and is sealed to the plates pipes, or wires. The top, of the bag is gathered and closed to …
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 June 5, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 5, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 5, 2014.
- 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.