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Expired Canadian patentCanada

Tetrapyrrole therapeutic agents

CA 1290753 C · Owner: Bommer, Jerry C. · Inventors: Burnham, Bruce F.; Bommer, Jerry C.

CIPO record

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Abstract From the Canadian patent

This invention relates to new fluorescent mono di- or polyamide of an aminomonocarboxylic acid and a tetrapyrrole containing at least three carboxy groups of the structure:, wherein Z is the amino acid residue and X is the tetrapyrrole residue and "n" is an integer from 1 to 4 inclusive.

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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 October 15, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 15, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 30, 1986
GrantedOctober 15, 1991
Term endedOctober 15, 2008
Patent numberCA 1290753 C
Classification (IPC)C07D487/22

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedApril 30, 1986Patent grantedOct 15, 1991Term endedOct 15, 2008

Sources & verification

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