Sewage disposal
CA 1284068 C · Owner: Copson, Alexander G. · Inventors: Baig, Mirza N.; Copson, Alexander G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Treated sewage e.g. digested sludge, is commonly disposed of by simple dumping in shallow inshore waters usually from barges or, by direct pumping through pipelines from onshore sites. According to the present invention treated sewage is loaded, into the tanks of a large ocean going tanker 1 transported therein, to a deep water site and then deposited directly onto the seabed at that site through piping deployed from the vessel and extending downwardly therefrom, The piping may be a flexible hose (e.g. plastics tubing in continuous or segmented form 32) or as string, of steel pipes, or a combination of the two. The piping may be deployed over the side of the vessel, or preferably from a …
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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 May 14, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 14, 2008.
- 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.