Water sheeting zwitterionomeric aminofunctional siloxanes
CA 2005948 C · Owner: Dow Corning Corporation · Inventors: Kasprzak, Kenneth A.; Swihart, Terence J.; Halloran, Daniel J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A polish formulation containing as components at least one member selected from the group consisting of waxes solvents, surfactants, thickening agents abrasives, dyes, odorants and other ingredients normally used in making polishes and as an improvement incorporating a composition which is the reaction product of an acid anhydride and an aminofunctional siloxane. The resulting zwitterionic aminofunctional siloxane can, if desired be further reacted, with a strong acid to provide an equilibrium of the zwitterion and a conjugate acid base pair of the zwitterion and the acid. The invention also includes a method of sheeting water on a surface with the polish a method of, making an …
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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 December 19, 1989 and granted December 22, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 19, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 19, 2011.
- 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.