Hydrophobic films
CA 2283699 A1 · Owner: Unisearch Limited · Inventors: Raston, Colin Llewellyn; Zhang, Hua; Lamb, Robert Norman
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of applying a hydrophobic film to a surface the method comprising , the steps of (a) optionally modifying particles to be coated on the surface so as to form functional groups thereon; (b) applying particles having functional groups thereon to the surface to be coated; and (c) treating the applied particles such that the particles are bound together and to the surface by chemical cross-linking of the functional groups on the particles. The method may further include the addition of a non-silicone polymer to the particles prior to step (b) to assist in the formation of the film.
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 March 20, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 20, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 20, 2020.
- 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.