Continuous manufacture of silicone copolymers via static mixing plug flow reactors
CA 2429601 A1 · Owner: Crompton Corporation · Inventors: Heisler, Ladislau; Austin, Paul E.; Davis, David B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A continuous process for the manufacture of silicone copolymer utilizing at least one static mixing plug flow reactor and optionally two static mixing , plug flow reactors in a series or parallel. Silicone copolymers produced in accordance thereof are substantially free of unreacted hydrogen siloxane starting material and may be used without further purification. The static mixing plug flow reactor contains static mixing elements capable of creating eddies and vortices of sufficient intensity that a biphasic liquid mixture such as a hydrogen siloxane fluid and an polyether olefinic reactant undergoes shearing of the droplets of each material so that one phase disperses into another …
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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 October 25, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 25, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 25, 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.