Molding of a polyalkylene glycol terephtalate and an aromatic ester
CA 2378321 C · Owner: Chienna B.V. · Inventors: Nieuwenhuis, Jan; De Wijn, Joost Robert; Bezemer, Jeroen Mattijs
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a process for molding a copolymer of a polyalkylene glycol terephthalate and an aromatic ester comprising the steps of: a) preparing a solution of the copolymer in a suitable first solvent; and b) forming a gel of the solution. This enables a solid body of a polymer to be produced without subjecting it to the high temperatures required for obtaining a melt.
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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 4, 2000 and granted May 22, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 4, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 4, 2022.
- 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
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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.