Phosphorus containing materials, their preparation and use
CA 2440256 A1 · Owner: Ucb, S.A. · Inventors: Van Den Bergen, Hugues
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is directed towards phosphorous containing organic materials, processes for making them and uses thereof. These materials preferably impart and/or exhibit resistance to attack for example they may be , useful as flame retardant additives and/or materials. The materials are especially radiation-curable polyester polymers. The phosphorous component used has at least one P-C bond resistant to hydrolysis or transesterification. It can be bis(hydroxymethyl)isobutylphosphineoxide bis(hydroxypropyl)isobutylphosphine oxide and trishydroxymethylphosphine oxide.In other embodiments, it is 9,10-dihydro-9-oxa-10-phosphaphenantrene- 10oxide.
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 March 5, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 5, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 5, 2024.
- 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.