Separation of the products of polyamide ammonolysis
CA 2393060 A1 · Owner: Yan, Yuhua · Inventors: Fergusson, Stuart Borden; Yan, Yuhua
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The useful reaction products in an output stream from an ammonolysis reactor are separated in a manner which minimizes the time during which high boiling polyamide intermediate material(s) are in contact with the amine-functional monomer product(s) or with the reactive monomer products in the stream.
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 January 17, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended January 17, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 17, 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.