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Expired Canadian patentCanada

Process for serially culturing keratinocytes

CA 1083987 A · Owner: Massachusetts Institute Of Technology · Inventors: Rheinwald, James G.; Green, Howard

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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 method is disclosed for serially culturing keratinocytes such as human epidermal cells and teratomal keratinocytes. These can be serially grown in culture to produce colonies and eventually stratified squamous epithelium by including in the culture fibroblast cells or medium harvested from fibroblast cultures, When fibroblast cells are used they are treated to, prevent their multiplication and they are also introduced into, the cultures at a controlled density.

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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 19, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 19, 1997.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 12, 1976
GrantedAugust 19, 1980
Term endedAugust 19, 1997
Patent numberCA 1083987 A
Classification (IPC)C12N5/00 +2 more

Timeline

Timeline From CIPO dates

1977198019831986198919921995Application filedNov 12, 1976Patent grantedAug 19, 1980Term endedAug 19, 1997

Sources & verification

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