Process for producing thin glass film by sol-gel method
CA 2053985 A1 · Owner: Ito, Masumi · Inventors: Kanamori, Hiroo; Hoshino, Sumio; Ito, Masumi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A thin glass film is produced by a sol-gel method comprising forming a hydrolyzable solution that contains a metal alkoxide, water, an alcohol and an acid contacting the, applied solution with an atmosphere containing ammonia to polycondensate the metal alkoxide, and heating it to form a thin glass film. The process enables thicker glass films to be formed on a substrate than has previously been possible.
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 October 22, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 22, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 22, 2013.
- 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.