Drain pipe
CA 1136869 A · Owner: Soderstrom, Gert W. · Inventors: Soderstrom, Gert W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A drain pipe consisting of an outer pipe casing (1) which, downwardly or on the lower surface is provided in the longitudinal direction with a recess, from which two partition walls (3,4) extend upward and are connected at the upper end to the inside of the pipe casing (1) via extensions (5,6) of the partition walls (3,4) resembling inclined roofs. In the inclined roof shaped extensions, which are connected in a line at the inside of the pipe casing (1) overflow openings, are milled in a single operation.
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
- Granted December 7, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 7, 1999.
- 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.