Expired Canadian patentCanada
Flame retardant polymer formulation
CA 2063990 C · Owner: Chaplin, Dominic · Inventors: Tingley, Lynne R.; Chaplin, Dominic
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention describes a formulation for halogenated polymers containing a synergistic mix of flame retardants comprising 10-400 phr of an aluminium or magnesium hydroxide and 0.5-80 phr of tin oxide or a metal stannate or hydroxystannate.
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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 July 20, 1990 and granted September 18, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 20, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 20, 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.
FiledJuly 20, 1990
GrantedSeptember 18, 2001
Term endedJuly 20, 2010
Patent numberCA 2063990 C
Classification (IPC)C08L57/08 +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.