Preparation of glucosamine hydrochloride
CA 2399844 A1 · Owner: Laidner, James Kenneth · Inventors: Laidner, James Kenneth; Gandhi, Neena
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of producing glucosamine hydrochloride from chitin by grinding the chitin to a very, fine size and digestion with concentrated hydrochloric acid. The glucosamine hydrochloride is, decolourized with activated charcoal washed with ethanol and assayed by pH titration with a, base.
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 August 23, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 23, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 23, 2024.
- 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.