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Expired Canadian patentCanada

Method and apparatus for cryopreparing biological tissue for ultrastructural analysis

CA 1319262 C · Owner: The Board Of Regents, The University Of Texas System · Inventors: Linner, John G.

CIPO record

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Abstract From the Canadian patent

This invention relates to a method for the cryopreparation of biological tissue samples for ultrastructural analysis. The process comprises vitrifying a biological tissue sample under severely rapid conditions and then depressurized. The depressurized, vitrified tissue sample is brought to equilibrium at a temperature of less than -140°C. The tissue sample is then dehydrated while maintained in a state of thermal equilibrium. The sample or specimen holding apparatus for cryopreparation thereof comprises a specimen chamber adapted to retain one or more tissue samples and a support assembly attached to the specimen chamber the, support assembly insulating the specimen chamber from energy …

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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

  • Granted June 22, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 22, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 8, 1984
GrantedJune 22, 1993
Term endedJune 22, 2010
Patent numberCA 1319262 C
Classification (IPC)F26B5/06 +1 more

Timeline

Timeline From CIPO dates

198519881991199419972000200320062009Application filedAug 8, 1984Patent grantedJune 22, 1993Term endedJune 22, 2010

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.