Hot melt adhesive composition
CA 2097303 C · Owner: Hughes, Vincent Leo · Inventors: Mehta, Aspy Keki; Milks, Robert Ramsey; Hughes, Vincent Leo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Hot melt adhesive composition comprises an ethylene-C3-20 alpha-olefin copolymer of molecular weight 20,000-100,000 and comonomer content 6-30 weight percent and a tackifier. An isobutylene based liquid copolymer may additionally be incorporated.
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 December 26, 1991 and granted October 29, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 26, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 26, 2013.
- 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.