Spill containment system
CA 2133022 A1 · Owner: Wilcox, Jack M. · Inventors: Von Kohn, Keith D.; Wilcox, Jack M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The containment system provides a simple but automatic closure device that requires minimum and low cost maintenance. Storm water can pass through the drains and does not require manual pumping like the prior art systems. Small amounts ofcontaminants will be absorbed as the water passes through the drain ensuring thestorm water leaving the containment area is free of contaminants. Hydrophobic swellable polymer particles are located in the drain to seal the drain in the event that organic liquids such as oil, gasoline, etc. flow into the drain.
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 September 27, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 27, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 27, 2016.
- 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.