Clear topped composter
CA 2024449 A1 · Owner: Warrington, John E. · Inventors: Warrington, John E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composting apparatus for composting yard and garden waste is provided, having a solar radiation transmissive top wall disposed at an angle of 5-45° at the horizontal, and presented towards the solar incident radiation. The rate of composting of vegetable waste materials within the composter is accelerated by the warming effect of the solar radiation through the top panel. The interior of the composting apparatus is aerated by the provision of ribs open to atmosphere at their bottom ends, so that air convection currents are developed upwardly through the composting apparatus as the composting proceeds. The unit is conveniently pyramidal in shape. A fast rate of composting is achieved in …
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 31, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 31, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 31, 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.