Reactor trays for a vertical staged polycondensation reactor
CA 2188792 C · Owner: Windes, Larry Cates · Inventors: Adams, James Wesley; Yount, Thomas Lloyd; Windes, Larry Cates
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a vertically disposed polymerization reactor (2) having a series of essentially circular tray assemblies (10); each tray assembly (10) having a central open vapor chimny (18) and a single flow path (26) composed of at least two loops (30, 32) wherein the liquid polymer flow is reversed by means of a substantially semi-circular turnaround wall (24); said trays havig a liquid polymer tray inlet (14) and a liquid polymer tray oudet (16) for conducting a flow of the liquid polymer by means of a hydraulic gradient; each tray assembly (10) being open at the top for escape of vapor from thG liquid polymer flow to the central open vapor chimny (18),and said trays (10) …
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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 April 21, 1995 and granted March 21, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 21, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 21, 2017.
- 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.