Precipitate-free dialysis solutions
CA 2017531 C · Owner: Bartz, Volker · Inventors: Reinhardt, Bertold; Bartz, Volker
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Dialysis solutions for hemodialysis and the like are prepared by, lowering the pH of a sodium carbonate solution to less than 7.6 under conditions which will retain the carbon dioxide generated by said acid addition and mixing said acid solution with a solution the other ions required in such a dialysis solution, again under conditions which will retain the carbon dioxide, to provide a dialysis solution which under working, conditions, will not cause finely divided precipitates of calcium carbonate to form.
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 May 25, 1990 and granted July 27, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 25, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 25, 2012.
- 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.