Method for producing thick crack-free coatings from hydrogen silsesquioxane resin
CA 2239345 A1 · Owner: Chung, Kyuha · Inventors: Saha, Chandan Kumar; Spaulding, Michael John; Chung, Kyuha
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention pertains to a method for producing crack-free, insoluble and greater than 1.25 µm thick coatings from hydrogen silsesquioxane resin compositions. This method comprises applying a fillerless hydrogen silsesquioxane resin composition onto a substrate and thereafter heating said resin at a temperature of less than 500°C. for a controlled period of time to produce the crack-free coating having a thickness of greater than 1.25 µm. The resins may be cured in either an inert or oxygen containing environment.
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 June 1, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 1, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 1, 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.