Silicon and aluminum complexes
CA 2080358 A1 · Owner: Youngdahl, Kay A. · Inventors: Youngdahl, Kay A.; Laine, Richard M.; Nardi, Paola
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Silicon and aluminum complexes having formulae (I) and (II) wherein x is 0 or 1, T is H or (III) each R is independently selected from the group consisting of H, OH, C1-6 alkyl C1-6 alkoxy, C2-6 alkene, C6-12 aryl, C1-6 hydroxyalkyl C1-6, thioalkyl, C2-12 alkoxyalkyl, C3-20 heteroaromatic and combinations, thereof, wherein R may further contain one or more atoms of a non-carbon element such as Si, Ge, Sn, P and the like; and Y is a , cation, are prepared by reacting silica or alumina with a diol in the presence of a base, while removing water formed during the reaction. Methods for producing such complexes starting with silica or alumina, and methods for converting such complexes into …
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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 April 12, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 12, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 12, 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.