Means for sawing elongate units from a tree-trunk
CA 2095846 A1 · Owner: Hellberg, Lennart · Inventors: Hellberg, Lennart; Brandt, Jerker
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Retaining the correct shape is difficult when two or more elongate units are obtained from a dried tree-trunk and joined together. This difficulty is avoided by using damp timber which is sawn into units, two or more units being joined together using a glue that requires moisture in order to cure. Units joined together are tied tightly before the drying process.
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 November 6, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 6, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 6, 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.