Polymer membranes
CA 2408381 C · Owner: Haring, Rima · Inventors: Kerres, Jochen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to novel organic/inorganic hybrid membranes which have the following composition: a polymer acid containing -SO3H- -PO3H2-, -COOH- , or B(OH)2 groups; a polymer base (optional) which contains primary, secondary , or tertiary amino groups pyridine groups, imidazole, benzimidazole triazole, benzotriazole-pyrazole or benzpyrazole groups either in the side chain or the , main chain; an additional polymer base (optional) containing the aforementioned base groups; an elemental oxide or metal oxide or metal , hydroxide, which has been obtained by the hydrolysis and/or sol-gel reaction of one elemental organic and/or organometallic compound during the membrane forming …
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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 27, 2001 and granted January 25, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 27, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 27, 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.