Zwitterionic polysiloxane compositions
CA 1305968 C · Owner: Owen, Michael J. · Inventors: Owen, Michael J.; Snow, Steven A.; Fenton, William N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A zwitterionic composition useful as a surface active agent in aqueous solutions is disclosed. Said composition is represented by the general formula, R'(CH3)2Si-OSiO(CH3)2wSiCH3R-OxSi(CH3)2R' where w is 0 to 50, x is 1, 2, 3, 4 or 5. R' denotes a methyl radical or an R radical, x + w is less than or equal to 50, and R denotes a monovalent zwitterionic radical of the general formula, - (CH2)yN+(R")2(CH2)zSO3where y is 1, 2 or 3, z is 3 or 4, and R" denotes an alkyl radical with 1 to 6 carbon atoms.
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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
- Granted August 4, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 4, 2009.
- 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.