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Expired Canadian patentCanada

Arachidonic acid analogues as anti-inflammatory and anti-allergic agents

CA 1209578 A · Owner: Syntex (U.S.A.) Llc. · Inventors: Nelson, Peter H.

CIPO record

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

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Abstract From the Canadian patent

Novel compounds of this invention are tetrazole acylhydroxylamine, hydroxymethylketone and amide derivatives of unsaturated fatty acids which are selective inhibitors of the enzymes lipoxygenase and cyclooxygenase involved in the production of pain, inflammation, bronchoconstriction and allergic reactions, having the formulae: (1), (2), (3), and the pharmaceutically acceptable non-toxic salts wherein, A and B each independently C=C or C=C D, E and F are each independently C-C, C=C or C?C Z is CH3, CH2CH3, -CH2CH2CH3, CH2CH2CH2CH3; and, X is 1-H-tetrazol-5-yl, C(O)NHOH, C(O)CH2OH or CONH2 which, compounds are beneficial in the treatment of a number of inflammatory and/or painful conditions …

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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 12, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 12, 2003.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 29, 1983
GrantedAugust 12, 1986
Term endedAugust 12, 2003
Patent numberCA 1209578 A
Classification (IPC)C07D257/04 +2 more

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedAug 29, 1983Patent grantedAug 12, 1986Term endedAug 12, 2003

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