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Expired Canadian patentCanada

Synthetic copolymer surgical articles and method of manufacturing the same

CA 1204894 A · Owner: Tyco Group S.A.R.L. · Inventors: Roby, Mark S.; Casey, Donald J.

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Abstract From the Canadian patent

A triblock copolymer having a proportion of units having the formula:, (I), as the end blocks, said formula I as an end block having a hydrogen atom attached to the terminal oxygen atom and the formula (I), randomly combined with a proportion of units having the formula: (II), as the middle block finds particular advantageous use in manufacturing absorbable monofilament sutures and other surgical articles. A surgical article is manufactured from a synthetic absorbable copolymer formed by copolymerizing glycolide with 1,3- dioxan-2-one (trimethylene carbonate) wherein a combination of the monomers is substantially completely polymerized before the addition of the other monomer in the …

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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 May 20, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 20, 2003.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 29, 1983
GrantedMay 20, 1986
Term endedMay 20, 2003
Patent numberCA 1204894 A
Classification (IPC)A61L17/00 +2 more

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedJune 29, 1983Patent grantedMay 20, 1986Term endedMay 20, 2003

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