Bioabsorbable polydepsipeptides, their preparation and use
CA 1338769 C · Owner: Glowaky, Raymond Charles · Inventors: Glowaky, Raymond Charles; Fung, Fu-Ning
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed are semi-crystalline depsipeptide polymers and copolymers particularly suitable for use in fabricating bioabsorbable medical implant devices such as sutures or clips and obtained through ring-opening polymerization of 3-substituted- 2,5-morpholinediones of the formula:, (wherein R is alkyl alkoxyalkyl, aryl, arylalkyl, alkylaryl alkylarylalkyl, alkylthioalkyl, alkylsulfinylalkyl alkylsulfonylalkyl, cyanoalkyl or aminocarbonylalkyl). The 3substituted-2,5-morpholinediones are prepared by reacting a naturally occurring alpha-amino acid H2N-CH(R)-COOH with an alphahalo acid chloride X-CH2CO-X in inert solvent in the presence of an acid acceptor.
Read the whole patent
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 3, 1996. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 3, 2013.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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.