Beneficiating waste sludges for agricultural use and product made thereby
CA 1266783 C · Owner: Nicholson, John Patrick · Inventors: Nicholson, John Patrick
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure A method of beneficiating waste sludge which comprises mixing kiln dust with waste sludge exposing, the mixture at ambient temperature without compacting for a time sufficient to produce a disintegratable friable product which can be applied to land as a soil conditioner.
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 March 20, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 20, 2007.
- 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.