Pressure sensitive adhesives having quaternary ammonium functionality, articles, and methods
CA 2471926 A1 · Owner: Zhu, Dong-Wei · Inventors: Lucast, Donald H.; Zhu, Dong-Wei
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A pressure sensitive adhesive composition is provided that includes a pressure sensitive adhesive polymer. The polymer includes: at least one copolymerized monoethylenically unsaturated (meth)acrylic acid ester monomer wherein the , (meth)acrylic acid ester monomer when homopolymerized, has a Tg of less than about 25 ~C; at least one copolymerized monoethylenically unsaturated reinforcing monomer, wherein the reinforcing monomer when homopolymerized, has a Tg of at least about 25 ~C; covalently bonded quarternary ammonium functionality; and, optionally, at least one copolymerized monoethylenically unsaturated poly(alkylene oxide) monomer. The composition optionally further includes …
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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 5, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 5, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 5, 2024.
- 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.