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Expired Canadian patentCanada

Fused pyrrolocarbazoles against inflammation

CA 2420592 C · Owner: Hudkins, Robert L. · Inventors: Gingrich, Diane E.; Hudkins, Robert L.

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

The present invention relates generally to selected fused pyrrolocarbazoles including pharmaceutical compositions thereof and methods of treating diseases therewith. The present invention is also directed to intermediates and processes for making these fused pyrrolocarbazoles.

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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 23, 2001 and granted January 11, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 23, 2021.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 23, 2023.
  • 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 23, 2001
GrantedJanuary 11, 2011
Term endedAugust 23, 2021
Patent numberCA 2420592 C
Classification (IPC)C07D487/04 +1 more

Timeline

Timeline From CIPO dates

2002200420062008201020122014201620182020Application filedAug 23, 2001Patent grantedJan 11, 2011Term endedAug 23, 2021

Sources & verification

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