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Expired Canadian patentCanada

Benzotropolone derivatives and modulation of inflammatory response

CA 2536842 C · Owner: Rutgers, The State University Of New Jersey · Inventors: Ghai, Geetha; Dushenkov, Slavik; Ho, Chi-Tang

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Abstract From the Canadian patent

The present invention provides novel benzotropolone derivatives represented by the general formula: including neotheaflavate B and EGCGCa. The benzotropolone derivatives of the present invention are effective antioxidant and antiinflammatory agents. The present invention also provides novel method of synthesizing benzotropolone compounds in high yields and method of treating inflammatory conditions using benzotropolone containing compounds.

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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

  • Filed August 30, 2004 and granted October 7, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 30, 2024.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 30, 2026.
  • 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 30, 2004
GrantedOctober 7, 2014
Term endedAugust 30, 2024
Patent numberCA 2536842 C
Classification (IPC)C07D311/62 +2 more

Timeline

Timeline From CIPO dates

2005200720092011201320152017201920212023Application filedAug 30, 2004Patent grantedOct 7, 2014Term endedAug 30, 2024

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