Sewage tanks and grinder pump systems
CA 2575809 C · Owner: Environment One Corporation · Inventors: Daley, Paul J.; Henry, Clark; Massey, Adrian
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A sewage tank (20, 100, 200, 300) for use with a pump (12) such as a grinder pump to convey sewage. The sewage tank includes a container (21) having an upper portion (24) and a lower portion (22) defining a chamber (30) for containing the pump. The upper portion has a generally constant cross-section and the lower portion has a tapered cross-section to reduce retained sewage. The upper portion and/or the lower portion includes a plurality of vertical ribs (25) and horizontal ribs (27) defining a plurality of recessed pockets (29). The lower portion of the sewage tank may also include an outwardly extending flange (40, 110) sufficiently sized so that soil may be backfilled around …
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 August 1, 2005 and granted April 9, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 1, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.