Perfluoroalkylthioethyl ether derivatives
CA 1102804 A · Owner: Novartis Pharmaceuticals Canada Inc./Novartis Pharma Canada Inc. · Inventors: Falk, Robert A.; Mueller, Karl F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Perfluoroalkyl compounds are provided which contain ether groups having the formula RfR1SCH2CH2O T Z, wherein Rf is perfluoralky R1 is alkylene, alkylene-, oxy, -thio- or -aminoalkylene T is alkylene or phenylene, and Z is hydrogen hydroxy, alkoxy, acyl. carbamyl, -O-CH2CH2SR1Rf -NR3R4, where R3 and R4 each is alkyl or together with nitrogen form a heterocyclic ring; where R5 is hydrogen, oxygen, alkyl, or substituted alkyl, X is an anion, and y is 1 or 2; z is 0 or 1. They can be prepared directly by free-radical catalysed addition of a perfluoroalkyl-thiol to a vinyl ether or subsequent reaction. These compounds are useful as surfactants and oil spill collecting agents.
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
- Granted June 9, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 9, 1998.
- 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.