Greenhouse heating system
CA 2088486 C · Owner: Amo, Don J. · Inventors: Amo, Don J.; Demeritt, Paul A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A readiant heating system for a greenhouse (10) utilizing radiator tubing (40 42, 44) formed from substantially gas impermeable plastic material. The system includes a radiator tube (40) disposed overhead and formed from light transmitting material so that sunlight projecting into the greenhouse will be substantially transmitted to the plants grown thereunder and a second radiator tubing (42) disposed proximate the greenhouse floor and formed of similar plastic material. The radiated tubes are interconnected at one of their ends and a burner (20) communicates through manifold connected to the other ends of the radiator tubes to transmit a heated effluent through the tubes. Valve means …
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 June 5, 1992 and granted March 18, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 5, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 5, 2014.
- 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.