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Expired Canadian patentCanada

Efficient prokaryotic expression system

CA 1338366 C · Owner: Anilionis, Algis · Inventors: Anilionis, Algis; Palmer, John L.

CIPO record

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Abstract From the Canadian patent

A novel highly effective prokaryotic expression system is exemplified specifically by being used to produce the useful enzyme .beta.-glucuronidase (BG). This system uses a hybrid plasmid comprising BG gene promoter DNA. The level of expression of BG by an E. coli K-12 derivative host is in the 50% of total cellular protein range. The invention expression system also can be used to express other useful proteins as, disclosed herein.

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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 4, 1996. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 4, 2013.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledFebruary 18, 1986
GrantedJune 4, 1996
Term endedJune 4, 2013
Patent numberCA 1338366 C
Classification (IPC)C12N15/70 +2 more

Timeline

Timeline From CIPO dates

198719901993199619992002200520082011Application filedFeb 18, 1986Patent grantedJune 4, 1996Term endedJune 4, 2013

Sources & verification

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