Stabilizer formulation for thermoplastic polymers
CA 2252953 A1 · Owner: Delucia, Mary Lou · Inventors: Delucia, Mary Lou; Hudson, Robert L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A stabilizer formulation particularly well suited for improving the properties of thermoplastic polymers is disclosed. The stabilizer formulation contains a combination of stabilizers that improves the process stability of a polymer, prevents the polymer from yellowing increases the thermal aging stability of the polymer and inhibits the polymer from generating smoke during melt processing. Of particular advantage, the stabilizer formulation improves the stability of a polymer without significantly adversely affecting any other properties of the polymer. In one embodiment, the stabilizer formulation includes a hindered amine, a hydroxyl amine, and one or more hydrolytically resistant …
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 November 26, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 26, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 26, 2020.
- 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.