Pressure sensitive adhesives containing block copolymer
CA 1266733 C · Owner: Tung, Lu Ho · Inventors: Tang, Raymond W.; Tung, Lu Ho
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. The adhesive comprises an ABA block copolymer wherein the A block is a copolymer of styrene and alpha-methylstyrene and the B block is a diene polymer. The diene polymer can be butadiene isoprene, or a copolymer thereof. The composition also contains a tackifying resin.
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
- Granted March 13, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 13, 2007.
- 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.