Spool and shell with pressurized fluid activated seal
CA 2206976 C · Owner: Conrad, Lucas Jones · Inventors: Conrad, Lucas Jones; Grubbs, Robert Eugene; Lovette, James Edward
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process and apparatus for tobacco expansion is employed for expanding tobacco at rapid throughput rates. The apparatus includes a spool and shell assembly (10) wherein the spool (16) is moveable within the shell (14) between loading (12), impregnating (18) and unloading (20) positions. In the impregnating position, sealing assemblies (38a-38d) seal the radial clearance between shell (14) and the end members (35 36) of the spool to provide a pressure vessel for tobacco impregnation. The sealing assemblies includes at least one elastically deformable sealing ring (28a 28b) associated with the circumferential exterior of the end member (35, 36). A pressure applying member (44a, 44b) is …
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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 June 4, 1997 and granted September 19, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 4, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 4, 2019.
- 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.