Hot gas extraction device for volatizing at least one substituent of a material
CA 2330445 A1 · Owner: Wheeler, David L. · Inventors: Wheeler, David L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An extraction device (20) utilizing hot air or gas for volatizing at least one substituent of a material is provided. The device (20) has a container (21) for holding material. The device also has a cap (27) that is provided with holes (30) leading from the exterior thereof to a chamber (28 29) in the cap. , The cap (27) is adapted to be seated on the container (21) so that the chamber (28, 29) of the cap communicates with an open end and a chamber (22) of the container. A non-flame type heating unit (31) is disposed in the chamber (28 29) of the cap (27) for heating gas. Gas is caused to pass through the holes (30) of the cap (27), into the chamber (28 29) thereof, through the …
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 July 29, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 29, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 29, 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.