Roof drain and method for making same
CA 2175967 C · Owner: Rasksen, Neil Brian Fisher · Inventors: Rasksen, Neil Brian Fisher
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A roof drain for draining rain water from a flat roof comprises a conduit, with a roof flange a strainer for straining debris from, the water entering the drain having an openable cap. The roof flange extends peripherally outwardly around the top of the conduit and, provides a connection between the surface of the roof. The conduit provides a connection with a drainage pipe located beneath the surface of the roof. The roof flange has a flat outer top surface and an recessed inner portion with a shoulder connecting the inner and outer portions of the roof flange. The strainer includes a hollow strainer basket with open bottom and top faces and side walls containing a plurality of apertures …
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 7, 1996 and granted July 14, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 7, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 7, 2018.
- 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.