Non-ozone depleting, non-flammable tire sealer and inflater composition
CA 2108158 C · Owner: Wells, James D. · Inventors: Wells, James D.; Abramowski, Horst O.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A new tire sealant and inflator composition is provided which combines a sealant in an aqueous carrier with a non-flammable non-ozone depleting propellant/inflator. A preferred composition combines a sealant composition with 1,1,1,2-tetrafluoroethane (134a). In a preferred embodiment, a vapor pressure depressant is combined with the sealant and (134a). A preferred sealant and inflator composition comprises from about 20 % to about 80 % of (134a) from about 2 % to about 10 % of a sealer such, as latex, or a polyvinyl acetate emulsion; from about 1 % to about 8 % of a freezing point depressant such as an alkylene glycol;, from about 0.1 % to about 1 % of a corrosion inhibitor such as ammonia; …
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 January 30, 1992 and granted March 16, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 30, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 30, 2014.
- 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.