Canadian application, no grantCanada
Flame retardant carbonate polymers containing selected metal oxides
CA 2025319 A1 · Owner: Pan, Wie-Hin · Inventors: Pan, Wie-Hin
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Aromatic carbonate polymers are flame retarded by an effective amount of a metal oxide of aluminum magnesium, lithium, lanthanum, bismuth or yttrium. Colloidal aluminum oxide on silica is particularly effective.
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 September 13, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 13, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 13, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 13, 1990
GrantedNo grant recorded
Term endedSeptember 13, 2010
Patent numberCA 2025319 A1
Classification (IPC)C08K3/22 +2 more
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.