Copolymer-based thermofusible adhesives alkyl (meth)acrylate ethylene and poly-alpha olefin
CA 2208308 C · Owner: Elf Atochem S.A. · Inventors: Schellenbeck, Peter; Krieger, Markus; Reuss, Wolgang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns thermofusible adhesives characterized as follows: (a) 30 to 90% by weight (A) of at least one essentially amorphous poly-alpha olefin and (B) at least one alkyl (meth)acrylate / ethylene copolymer the mass ratio (B) / (A) + (B) ranging from 0.05 to 0.55; (b) 10 to 70% by weight of a tackifying resin; (c) 0.1 to 3 parts by weight of an antioxidant for 100 parts by weight of compounds under (a) and (b). It also concerns the use of these adhesives in the wood binding and packaging industries.
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 10, 1997 and granted February 4, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 10, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 10, 2019.
- 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.