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Expired Canadian patentCanada

A moisture curable, isocyanate-functional medical adhesive and methods of tissue adhesion

CA 2576223 C · Owner: Zhang, Jianying · Inventors: Buckley, Michael; Zhang, Jianying; Beckman, Eric J.

CIPO record

Overview

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

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Abstract From the Canadian patent

An adhesive including a mixture of isocyanate capped molecules formed by reacting multi-isocyanate functional molecules with multi-functional precursor molecules including terminal functional groups selected from the group consisting of a hydroxyl group, a primary amino group and a secondary amino group. Preferably, the functional groups are hydroxyl groups. The multifunctional precursor compounds are biocompatible. Multiamine functional precursors of the multi-isocyanate functional molecules are also biocompatible. As discussed, above, the mixture of molecules preferably has an average isocyanate functionality of at least 2.1 and more preferably, has an , average isocyanate …

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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 May 27, 2004 and granted October 8, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 27, 2024.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 27, 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.
FiledMay 27, 2004
GrantedOctober 8, 2013
Term endedMay 27, 2024
Patent numberCA 2576223 C
Classification (IPC)A61L24/04 +1 more

Timeline

Timeline From CIPO dates

2005200720092011201320152017201920212023Application filedMay 27, 2004Patent grantedOct 8, 2013Term endedMay 27, 2024

Sources & verification

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