Amorphous polyether glycols based on bis-substituted oxetane monomers
CA 2379371 A1 · Owner: Archibald, Thomas G. · Inventors: Malik, Aslam A.; Carlson, Roland P.; Wynne, Kenneth J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention is directed to mono- and bis-substituted oxetane monomers having fluorinated alkoxymethylene side chains hydroxy-terminated prepolymers , derived from these mono- and bis-substituted oxetane monomers and tetrahydrofuran (THF), and polymers produced from these prepolymers as well , as the synthesis processes associated with each and the use of the monomers, prepolymers and ultimate polymers both directly and as components of numerous compositions.
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 13, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 13, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 13, 2022.
- 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.