Polyoxyalkylene phosphonates and improved process for their synthesis
CA 2562269 C · Owner: Baker, John Marshall · Inventors: Wo, Shiming; Baker, John Marshall
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for preparing polyoxyalkylene phosphonates in high yield and purity without extensive isolation procedures. The process also enables hydroxy terminated polyoxyalkylene phosphonates to be produced with their attendant high aqueous solubility and the availability of the reactive group to have the end functionality easily molecularly modified. Products produced by these processes have enhanced dispersion, coating adhesion, and plasticizing , characteristics as a result of the lack of any steric hinderance of these polyoxyalkylene phosphonates.
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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 6, 2005 and granted November 25, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 6, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
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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.