High pressure and temperature solvent extraction cell
CA 2214528 C · Owner: Rothe, Norman J. · Inventors: Gleave, Gary L.; Rothe, Norman J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An extraction cell apparatus (10) for use in elevated pressure and temperature fluid extractions having a pressure resistant vessel (12) forming a cavity (11), and at least one shoulder portion (13) defining an opening (14) communicating with the cavity (11). An insert member (16) is provided engaging the vessel (12) proximate the shoulder portion (13) and a shoulder seal , member (17) is positioned proximate the insert member (16). The seal member (17) is positioned for contact with the shoulder portion (13) upon mounting engagement of the insert member (16) with the seal member (17). An end cap (18) is formed for sliding receipt of the insert member (16) therein until an interior …
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 February 29, 1996 and granted January 23, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 29, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 1, 2018.
- 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.