Heterogeneous organotin catalysts
CA 2504077 C · Owner: Chemtura Organometallics Gmbh · Inventors: Jousseaume, Bernard; Toupance, Thierry; Schneider, Uwe
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 an organotin compound of the formula X1 to X3: , (see formula X1) or (see formula X2) or (see formula X3) wherein , Z = a spacer group -(CH2)m- Y is an insoluble phenyl-group containing copolymer acryinitril-butadienstyrene , copolymer, polystyrene-based copolymer methyl methacrylate-butadien-styrene , copolymer polyphenylenether (co)polymer, polyethylene terephthalate polyphenylene sulfide, polyurethane or polyamide crosslinked polystyrene , polymers, cross linked by ethylene glycol dimethacrylate trimethylolpropane , trimethacrylate, divinyl toluene or trivinyl benzene m=2-24 , R1, R2, R3 are independently selected from a halogen C1-C18 alkyl, C1-C18 …
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 April 13, 2005 and granted February 21, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 13, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.