Reactive wax-containing moisture curable hot melt composition
CA 2187524 A1 · Owner: Stobbie, Charles W. Iv · Inventors: Tangen, John C.; Stobbie, Charles W. Iv
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A moisture curable hot melt composition comprises: (a) a first isocyanate-terminated polyurethane prepolymer that is the reaction product of a crystalline polyester polyol and a polyisocyanate; (b) a crystalline reactive wax; and (c) optionally, a second isocyanateterminated polyurethane prepolymer that is the reaction product of a hydroxy-functional polymer that is different than the crystalline polyester polyol.
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 June 8, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 8, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 8, 2016.
- 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.