Seal for use with roof drains
CA 2272216 C · Owner: Thaler, Ken · Inventors: Thaler, Ken
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A sealing grommet is for use in coupling in sealed relation a drain pipe depending from a roof and a co-operating leader pipe. The bottom end of the drain pipe is inserted into the top end of the co-operating leader pipe. The outside diameter of the drain pipe is smaller than the inside diameter of the co-operating leader pipe by an unspecified distance. The sealing grommet comprises an annular base having an outer surface and an upper end. The annular base defines a first opening. An annular interior wall is joined to the annular base at the upper end. The annual interior wall has a cylindrical inner surface defining a cylindrical opening aligned with the first opening a cylindrical outer …
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 May 18, 1999 and granted April 29, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 18, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 18, 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.