Stormwater sediment and litter trap
CA 2247035 A1 · Owner: Nicholas, Douglas Ian · Inventors: Nicholas, Douglas Ian
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pollution control device (10) for removal of litter and sediments from a flowing stream of stormwater or the like, the device including an upwardly inclined flume (11,18) adapted to be disposed adjacent the discharge end of a stormwater outlet (16) with a collection container (12) at the opposite end of the flume the flume (18) and the, container (12) being fabricated from expanded metal mesh screen. During stormwater flow, litter entrained with the stormwater is urged up the inclined path of the flume (18) for collection in the container (12) whereas sediments are screened from the flume (18) and the container (12) through apertures in the expanded metal screen and pass through to a …
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 February 21, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 21, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 21, 2019.
- 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.