Shield for trees
CA 2036476 A1 · Owner: Henri, Jacques · Inventors: Henri, Jacques
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The shield serves to surround tree trunks especially along city streets in order to protect the same against damage by snow plows and other moving vehicles. For small trees one, shield, mainly containing rubber reclaimed from used tires is, wrapped spacedly around the tree trunk and held in curved condition by means of rigid straps. For tree trunks of greater diameter, at least two sheets of the same material are joined together and made to surround the tree trunk being held around the same by suitable strapping. In this latter case the lower, portion of the sheet forms a skirt composed of a plurality of tongues which can be spread out to make room for any protruding tree roots. In both …
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 15, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 15, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 15, 2013.
- 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.