Seedling growth enhancing device
CA 2248401 A1 · Owner: Lais, Joseph F. · Inventors: King, Lawrence H.; Lais, Joseph F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A seedling growth-enhancing device is disclosed consisting of a circular tube, formed from flexible non-opaque thermoplastic material having a slit formed over its length. The tube is of sufficient size as to substantially enclose the seedling and the plastic material is, inherently resilient so that the device is normally biased into its tubular configuration. The opposed edges of the slit are fastened at the top and bottom to permit the edges to be resiliently spread at an intermediate point to permit access to the seedling for maintenance. Also disclosed are an H-clip for releasably fastening the opposed edges and a wire hanger for suspending the circular tube from an overhead suspension …
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 September 24, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 24, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 24, 2020.
- 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.