De-icing composition and anti-icing composition for aircraft
CA 2133372 C · Owner: Hoechst Aktiengesellschaft · Inventors: Pollmann, Klaus; Stankowiak, Achim; Kapfinger, Josef
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A novel non-thickened de-icing composition and anti-icing composition for aircraft is described. It comprises essentially glycols and water as the main components at least one nonionic surfactant from the group consisting of fatty alcohols and low molecular weight alkoxylates thereof and preferably another anionic surfactant from the group consisting of alkali metal alkylarylsulfonates corrosion inhibitors and, if appropriate pH regulators. The novel composition has a relatively long holdover time and therefore combines the advantages of non-thickened and thickened aircraft de-icing compositions.
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 30, 1994 and granted March 25, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 30, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 30, 2016.
- 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.