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Expired Canadian patentCanada

Use of metal chelate complexes in dehalogenation

CA 1338313 C · Owner: The Microbiological Research Authority · Inventors: Maule, Andrew; Marks, Trevor Simon

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Abstract From the Canadian patent

A method for dehalogenation of organohalogen compounds eg, environmental pollutants in industrial waste. The organohalogen is reacted with a reducing agent in the presence of a selected metal-centred corrin, porphyrin or phthalocyanine complex. Preferred complexes are hydrolysis products of cyanocobalamin of, formula:, in which R1 is NH2 or OH R is H, CH2CH2COOH or CH2CH2CONH2, R3 is H, CH2CH2COOH or CH2CH2CONH2, and R4 is NHCH2CH(OH)CH3 OH or NH2. The complex is preferably immobilised on a substrate. Some novel metal-centred porphyrin complexes are also described. A dehalogenation apparatus using the method of the invention is also described.

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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 May 7, 1996. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 7, 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.
FiledMay 8, 1989
GrantedMay 7, 1996
Term endedMay 7, 2013
Patent numberCA 1338313 C
Classification (IPC)A62D3/34 +2 more

Timeline

Timeline From CIPO dates

19901993199619992002200520082011Application filedMay 8, 1989Patent grantedMay 7, 1996Term endedMay 7, 2013

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