Effervescent base
CA 2306633 A1 · Owner: Gergely, Thomas · Inventors: Gergely, Thomas; Gergely, Irmgard; Gergely, Gerhard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The effervescent base for the preparation of effervescent tablets and effervescent granules consists of at least one acidic and one gas-evolving component, the former of which is formed by a mixture of (predominantly) monosodium tartrate and (possibly) disodium tartrate and optionally tartaric , acid. The effervescent base is prepared by mixing tartaric acid with sodium bicarbonate and sodium carbonate containing water of crystallization and slowly reacting the mixture at a temperature increasing to about 50 ~C after , which further sodium carbonate containing water of crystallization is admixed and is allowed to react up to a temperature of about 60 ~C and drying is then , carried …
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 October 21, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 21, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 21, 2020.
- 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.