Blends of vinyl polymer and polysiloxane
CA 2103559 C · Owner: S.C. Johnson Commercial Markets, Inc. · Inventors: Calhoun, Glenn C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel polymeric compositions are disclosed. The polymeric compositions in , particular, are either soluble or readily dispersible in water. Such polymeric compositions can be characterized as polymeric blends containing at least one acid-functional vinyl polymer and at least one amino-functional siloxane polymer. the novel polymeric blends further include volatile aqueous media comprising water and base in an amount that is effective for preventing the acid-functional moieties of the vinyl polymer from chemically reacting with the amino-functional moieties of the siloxane polymer. Such compositions or "blends" in general. comprise 60-99.9 parts-by-weight of the acid-functional vinyl …
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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 January 27, 1992 and granted July 18, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 27, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 27, 2014.
- 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.