Aqueous compounds containing alkoxysilane and/or silanol groups
CA 2292001 A1 · Owner: Roesler, Richard R. · Inventors: Yu, Poli C.; Corso, William A.; Roesler, Richard R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to aqueous solutions or dispersions of compounds, which contain 0.5 to 6% by weight of alkoxysilane and/or silanol groups (calculated as Si, MW 28) based on the weight of the, compounds containing alkoxysilane groups and are substantially free, from isocyanate groups and chemically incorporated hydrophilic groups wherein the alkoxysilane groups are initially incorporated by the reaction of a polyisocyanate with an amino compound corresponding to formula I (see above formula), wherein, X represents identical or different organic groups which are inert to isocyanate groups below 100°C, provided that at least one of these groups is an alkoxy group, Y represents a …
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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 10, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 10, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 10, 2021.
- 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.