Toughened cyanoacrylate adhesive composition containing polyester polymers
CA 2076623 C · Owner: National Starch And Chemical Investment Holding Corporation · Inventors: Mitry, Mark
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cyanoacrylate adhesive composition having improved toughness comprising a cyanoacrylate monomer and an effective toughening amount of a polyester polymer derived from a dibasic aliphatic or aromatic carboxylic acid and a glycol and having repeating units of the structure: (see fig. I), where R is the organic residue of the dibasic carboxylic acid and R1 is the organic residue of the glycol, the polyester having a weight average molecular weight of greater than 10,000 and a Tg of from about -40 to 30°C.
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 August 21, 1992 and granted December 16, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 21, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 21, 2014.
- 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.