Process for recycling resin covered with paint film
CA 2175016 C · Owner: Sato, Norio · Inventors: Takahashi, Naoyuki; Ikeda, Sadao; Sato, Norio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for recycling a thermoplastic resin covered with a thermosetting- resin paint film includes the steps of decomposing the paint film by bringing the ther- moplastic resin covered with the paint film into contact with a paint-film-decomposing agent in a molten state and removing decomposed products, resulting from the paint film and the paint-film-decomposing agent and the residual paint-film-decomposing agent by degassification to prepare a recycled resin. The paint-film-decomposing agent can be primary amines and/or secondary amines having a boiling point of 250 °C or less or being decomposed at 250 °C or less, or can be tertiary amines and/or qua- ternary amines having a boiling …
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 April 25, 1996 and granted July 6, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 25, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 25, 2018.
- 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.