Synergistic flame-retardant combination for plastics
CA 2246124 A1 · Owner: Clariant Gmbh · Inventors: Nass, Bernd; Jenewein, Elke; Wanzke, Wolfgang
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 a synergistic flame retardant combination for thermoplastic polymers which comprises as component A a salt of 1-hydroxydihydrophosphole oxides of the formula (Ia) or formula (Ib) and/or 1-hydroxyphospholane oxides of the formula (II), (see fig. I) (see fig. II) (see fig. III) and as component B a nitrogen compound of the formula (III) to (VIII) or a mixture of the compounds designated by the formulae, (see fig. IV) (see fig. V) (see fig. VI) , , in which the substituents are as defined in the description.
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 August 28, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 28, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 28, 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.