Process for preparing organic compost from municipal refuse
CA 2030282 C · Owner: Barron, Nancy · Inventors: Glogowski, Mark E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for converting municipal garbage into organic compost material is described. In the first step of this process a mixture of shredded, cellulosic refuse material and earthworms is provided. A substantial portion of the shredded cellulosic refuse material is derived from paper and/or cardboard refuse. In the second step of the process the mixture of refuse, material and earthworms is maintained at a moisture content of from about 45 to about 92 weight percent and a temperature of from about 0 to about 54 degrees centigrade for from about 4 to about 8 months.
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 November 19, 1990 and granted October 19, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 19, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 19, 2012.
- 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.