Thermosetting mixtures utilizing araliphatic sulfonium salts
CA 2027768 C · Owner: Vantico Ag · Inventors: Munk, Kurt; Roth, Martin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Thermosetting mixtures containing, (a) an epoxy resin having on average more than one 1,2-epoxide group in the molecule, (b) a di- or polyisocyanate compound and (c) a sulfonium salt of the formulae I to IV in which A is C1-C12alkyl, C3-C8cycloalkyl C4-C10cycloalkylalkyl or phenyl , which is unsubstituted or substituted by one or more substituents from the group comprising, C1-C8alkyl, C1-C4alkoxy, halogen nitro, phenyl, phenoxy, alkoxycarbonyl having 1-4 C, atoms in the alkoxy radical or acyl having 1-12 C atoms Ar, Ar1 and Ar2 , independently of, one another are each phenyl which is unsubstituted or substituted by one or more, substituents from the group comprising C1-C8alkyl …
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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 October 16, 1990 and granted July 3, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 16, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 16, 2012.
- 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
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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.