Tobacco reconstitution
CA 2407430 A1 · Owner: Prowse, Roy Lester · Inventors: Lewis, William David; Conti, Humberto; Prowse, Roy Lester
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to the extrusion of filamentary strands of reconstituted tobacco through a die plate and the downstream handling thereof. The die plate is configured such that each filament is of a square or rectangular crosssection, the downstream handling of which effects draw down of the extruded filament.
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 May 8, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 8, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 8, 2023.
- 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.