Improved gas phase fluidized bed polymerization process using sonic cleaner with optimum design and operation
CA 2296475 C · Owner: Union Carbide Chemicals & Plastics Technology Corporation · Inventors: Cai, Ping; Rebhan, David Merrill; Painter, Roger Brady
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An improved process is provided for polymerization of olefin and/or diolefin polymer, using sonic cleaning devices, with optimum design and operation to , eliminate or reduce reactor fouling and/or sheeting.
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 15, 1998 and granted October 14, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 15, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 15, 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.