Expired Canadian patentCanada
Hydroxyl functional monomers
CA 1340163 C · Owner: Medtronic, Inc. · Inventors: Coury, Arthur J.; Hobot, Christopher M.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
By reacting polyamines with ethylene carbonate hydroxyethyl urethane diols and polyols are produced. These diols and polyols are particularly useful for the synthesis of polyurethanes by reaction with diisocyanates or polyisocyanates.
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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 December 8, 1998. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 8, 2015.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 28, 1989
GrantedDecember 8, 1998
Term endedDecember 8, 2015
Patent numberCA 1340163 C
Classification (IPC)C07C271/12 +2 more
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.