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Expired Canadian patentCanada

Method for cultivating cells and an instrument therefor

CA 1305934 C · Owner: Yamamura, Masaichi · Inventors: Watanabe, Katsuto; Nakashima, Hitoshi; Yamamura, Masaichi

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

The invention relates to a method and an instrument where, an outer bag supporting culture media houses therein and an inner bag of a half transparent film supporting cell suspended liquid. The cells are cultivated at high concentration by the cells suspended liquid and diffusion phenomina due to concentration inclination.

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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 August 4, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 4, 2009.
  • 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 27, 1987
GrantedAugust 4, 1992
Term endedAugust 4, 2009
Patent numberCA 1305934 C
Classification (IPC)C12M3/00 +2 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedAug 27, 1987Patent grantedAug 4, 1992Term endedAug 4, 2009

Sources & verification

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