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Expired Canadian patentCanada

Membrane invasion culture system

CA 1266603 C · Owner: Gehlsen, Kurt R. · Inventors: Gehlsen, Kurt R.; Hendrix, Mary J.C.

CIPO record

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

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Abstract From the Canadian patent

A cell culture system for performing cell invasion assays comprises a base plate and a top plate. The base plate includes a plurality of wells formed in one face thereof, while the top plate includes a plurality of apertures arranged in substantially the same pattern as the wells in the base plate. By placing a test membrane between the plates and securing them together, a plurality of test receptacles are formed, each receptacle having an upper chamber and a lower chamber separated by the test membrane. Invasion assays are performed by filling the lower chamber with a suitable culture medium and seeding the cells to be tested in the upper chamber.

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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 March 13, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 13, 2007.
  • 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 14, 1985
GrantedMarch 13, 1990
Term endedMarch 13, 2007
Patent numberCA 1266603 C
Classification (IPC)C12Q1/04 +2 more

Timeline

Timeline From CIPO dates

19861989199219951998200120042007Application filedAug 14, 1985Patent grantedMarch 13, 1990Term endedMarch 13, 2007

Sources & verification

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