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Expired Canadian patentCanada

Peptide boronic acid inhibitors of trypsin-like proteases

CA 1333208 C · Owner: E.I. Du Pont De Nemours And Company · Inventors: Shenvi, Ashokkumar Bhikkappa; Kettner, Charles Adrian

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

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Abstract From the Canadian patent

Peptides comprising C-terminal boronic acid derivatives of lysine, ornithine, and arginine homoarginine and corresponding isothiouronium analogs thereof, are reversible inhibitors of trypsin-like serine proteases such as thrombin, plasma kallikrein and plasmin.

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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 November 22, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 22, 2011.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 31, 1988
GrantedNovember 22, 1994
Term endedNovember 22, 2011
Patent numberCA 1333208 C
Classification (IPC)C07K5/04 +2 more

Timeline

Timeline From CIPO dates

19891992199519982001200420072010Application filedMay 31, 1988Patent grantedNov 22, 1994Term endedNov 22, 2011

Sources & verification

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