Transparent amorphous compositions with high chemical strength
CA 2086500 C · Owner: Blondel, Philippe · Inventors: Blondel, Philippe; Maj, Philippe
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to new transparent amorphous compositions more specifically transparent amorphous compositions having a high concentration of chemical agents (solvents) and objects manufactured from them. The compositions contain two polyamides consisting of aliphatic units terephtalic acid and/or isophtalic units and cycloaliphatic diamine units. One of the two polyamides has a high concentration of aliphatic units wheras the other has a low concentration of aliphatic units.
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
- Filed December 30, 1992 and granted February 16, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 30, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 30, 2014.
- 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.