Arc-extinguishing composition and articles fabricated therefrom
CA 2012365 C · Owner: S & C Electric Company · Inventors: Syvertson, Suzanne M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An arc-quenching composition that is suitable for deionizing and extinguishing a high-voltage electrical arc comprises an arc-extinguishing material such as, melamine, and a binder, the binder including a thermoplastic polymer polymerized from a carboxylic acid moiety-containing monomer either as a homopolymer or as a copolymer with another monomer, preferably ethylene acrylic acid. The composition comprises effective amounts by weight of the arc-extinguishing material and the thermoplastic polymer to achieve the desired combination of arc-extinguishing properties and structural characteristics, such as tensile strength elongation, and environmental resistance to thermal cycling. …
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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 March 16, 1990 and granted July 27, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 16, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 16, 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.
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.