Method and apparatus for cryopreservation
CA 2308250 A1 · Owner: Acton, Elizabeth · Inventors: Acton, Elizabeth; Morris, George John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of cryopreserving biological material which method comprises , providing a sample of the biological material where a liquid phase of the , sample includes at least one solute; lowering the temperature of the sample to a nucleating point at which ice nucleation can occur in the sample; effecting ice nucleation in the sample; and lowering the sample temperature from the nucleating point to the solidification point thereof characterised in that , the temparature lowering from the nucleating point to the solidification point is non linear, whereby the rate of change of solute concentration in the liquid phase decreases for more than 80 % of the time taken to lower the temperature …
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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 October 22, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 22, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 22, 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.