Pressure sensitive adhesives from diene-ethoxylated amine styrene sulfonate
CA 2004329 A1 · Owner: Thaler, Warren A. · Inventors: Agarwal, Pawan K.; Thaler, Warren A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to emulsion type adhesive compositions which include a metal neutralized copolymer of a conjugated diene and an ethoxylated alkylamine salt of a styrene sulfonate wherein the sulfonated copolymer has 5 to 125 meq. of sulfonate groups per 100 grams of the sulfonated copolymer, and less than 250 parts by weight of a hydrocarbon resin of a petroleum or coal tar distillate, having 5 to 6 carbon atoms, the hydrocarbon resin being composed of aliphatic dienes and monoolefins per 100 parts by weight of the neutralized sulfonated copolymer.
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
- Filed November 30, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 30, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 30, 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
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.