Counterweight for spring activated drain pipe
CA 2276953 A1 · Owner: Gleadall, Robert F. J. · Inventors: Gleadall, Robert F. J.; Belke, Brad
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A counterweight for a spring activated drain pipe includes a hollow body having an exterior surface an interior, cavity, a first end, and a second end. A flow channel extends from the first end to the second end which has an inlet at the first end and an outlet at the second. A coupling is provided for connecting the inlet of the flow channel with a remote end of a drain pipe. A collection basin at the first end of the body surrounds the inlet of the flow channel. An inflow opening is provided from the collection basin to the interior cavity of the hollow body, such that as liquid reaches a preset level in the collection basin, the liquid flows via the inflow opening into the interior …
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 July 6, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 6, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 6, 2021.
- 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.