Inlet control device
CA 2089420 A1 · Owner: Enright, Patrick · Inventors: Enright, Patrick
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a device for controlling the flow of fluid through a manhole inlet comprising a base plate having an opening therethrough the base plate being, releasably securable to the manhole with the base plate opening communicating with the manhole inlet and a plate having a notch along one edge thereof releasably securable to the base plate so as to adjust and control the flow of fluid through the manhole inlet.
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 12, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 12, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 12, 2015.
- 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.