Optically clear hydrophobic coating composition
CA 2180137 C · Owner: Gasmena, Roland L. · Inventors: Gasmena, Roland L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An optically clear hydrophobic coating is prepared by combining in the presence of water fluorinated polysiloxane having multiple hydrolyzable side groups selected from the group including alkyl aryl, or alkoxy groups having from one to four carbon atoms with, polysiloxane, with polyester modified polysiloxane with acid, and with alcohol. The polysiloxane ingredients are combined and blended together. The acid and alcohol ingredients are combined together and mixed with the polysiloxane ingredients. The polysiloxane ingredients undergo hydrolysis and polycondensation/polymerization reactions to form a fluorinated polyester modified polysiloxane polymer that when applied to a substrate …
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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 December 20, 1994 and granted April 17, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 20, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 20, 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.