Tropodegradable bromine-containing halocarbon additives to decrease flammability of refrigerants, foam blowing agents, solvents, aerosol propellants, and sterilants
CA 2266711 A1 · Owner: Tapscott, Robert E. · Inventors: Tapscott, Robert E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A set of tropodegradable chemical additives to decrease the flammability of normally flammable refrigerants, foam blowing agents cleaning solvents, aerosol propellants and sterilants is disclosed. The additives are characterized by high efficiency and short atmospheric lifetimes. The latter property is essential and results in a low ozone depletion potential (ODP) and a low global warming potential (GWP). The additives are bromine-containing alkenes, bromine-containing alcohols, bromine-containing ethers with at least one hydrogen atom adjacent to the oxygen atom bromine-containing amines with , at least one hydrogen atom adjacent to the nitrogen atom bromine-containing , carbonyl …
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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 September 26, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 26, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 26, 2019.
- 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.