Sanitation system
CA 2066752 C · Owner: Humphrey, Frank · Inventors: Humphrey, Frank
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A sanitation system for treating a black water stream and a grey water stream. The black water stream is inputted into a black water digester wherein the black water stream is aerobically digested to produce a treated black water stream and the treated black water stream is discharged from the black water digester. The treated black water stream is inputted into a black and grey water digester and the grey water stream also is inputted into the black and grey water digester and the grey water stream also is inputted into the black and grey water digester. The treated black water stream and the grey water stream are aerobically digested in the black and grey water digester to produce a …
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 April 11, 1991 and granted November 2, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 11, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 11, 2013.
- 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.