Bead polymerizates containing halogen-free phosphorus compounds
CA 2402188 A1 · Owner: Seidel, Andreas · Inventors: Eckel, Thomas; Wittmann, Dieter; Seidel, Andreas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to novel cross-linked bead polymerizates with an average particle size of between 1 to 1000 m that contain specific halogen-free phosphorus compounds. The invention further relates to a method for producing said bead polymerizates and to the use thereof as flame retardants in thermoplastics.
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 February 26, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 26, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 26, 2023.
- 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.