Process and apparatus for the recovery of chitin
CA 2201212 A1 · Owner: Picard, Gaston · Inventors: Pomerleau, Lucien; Picard, Gaston
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process and apparatus as described wherein shellfish waste is successively treated using sodium hydroxide to deproteinize the shells; hydrochloric acid remove minerals and ethanol to decolor a chitin product. The chitin may then be treated with sodium hydroxide to produce chitosan. The apparatus described and the apparatus in which the foregoing process is carried out is a single tank vessel where the liquid reactants are successively introduced and removed.
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 March 27, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 27, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 27, 2019.
- 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.