Autophobic water repellent surface treatment
CA 2175849 C · Owner: Goodwin, George B. · Inventors: Goodwin, George B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composition and method are disclosed to provide a substrate such as glass, plastic, metal inorganic polymer, coated substrate or inorganic coated substrate with a durable non-wetting surface. The composition includes a perfluoroalkylalkyl silane selected from compounds having the general formula RmR'nSiX4-m-n where R is a perfluoroalkylalkyl radical, R' is an alkyl or vinyl radical m+n is not greater, than 3, and X is selected from halogen alkoxy or acyloxy, radicals. The perfluoroalkylalkyl silane is in a solvent such as an alkane, alkene, aromatic hydrocarbons ether, ketone or, halogenated hydrocarbon which together form a composition which initially wets the surface. As the …
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 May 6, 1996 and granted July 15, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 6, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 6, 2018.
- 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.