A method for imparting hydrophobicity to a surface of a substrate with low concentration organofunctional silanes
CA 2250879 C · Owner: Goelz, John F. · Inventors: Goelz, John F.; Munagavalasa, Murthy S.; Varanasi, P. Prabodh
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method is disclosed for imparting hydrophobicity to the surface of a substrate that is repeatedly treated with a solution containing a low level organofunctional silane. The method has particular application in toilet bowl dispensing systems, hard surface cleaners and for providing abrasion or scratch resistant coatings.
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 31, 1997 and granted May 20, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 31, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 31, 2019.
- 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.