Plant greenhouse frost protector and growth enhancer
CA 2299083 C · Owner: Reed, George · Inventors: Reed, George
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A plant greenhouse frost protector and growth enhancer for use with seedlings or young plants. The protector is frusto-conically shaped and made of, a light transparent, semi-transparent or translucent transmitting plastic material. The protector's base has a series of ground engaging serrations with adjacent spaced slots. Prior to forming tabs, base slots normally extend upwardly towards the protector's top edge. Normally serrations hold the protector to the, ground by the serrations in low wind conditions. In high wind conditions tabs, are formed by folding the base's areas between the slots outwardly and upwardly. These formed tabs form ground engaging surfaces parallel to the ground. …
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 February 17, 2000 and granted October 29, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 17, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 17, 2022.
- 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.