Process for reinforcing a glass fiber attachment surface and article
CA 2107283 A1 · Owner: Henry, David · Inventors: Henry, David
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a process for strengthening the surface of a humidity sensitive glass article, characterized in that it comprises: (A) bringing the surface to be strengthened into contact with an aqueous solution of an acid and the product of the hydrolysis of a silane containing at the same time hydrolyzable groups linked to the silicon and a functional group insensitive to the acid; then, (B) bringing the surface to be strengthened into contact with an alkaline aqueous solution of sodium silicate and/or potassium silicate; and (C) drying and hardening the coating applied on the surface of the glass as the result of steps (A) and (B). Application to the production of optical fiber …
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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 September 29, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 29, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 29, 2015.
- 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.