Expired Canadian patentCanada
Aqueous dispersions of nonionic polyurethanes
CA 1330466 C · Owner: Ici Americas Inc. · Inventors: Vartan-Boghossian, Razmik; Coogan, Richard George
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An aqueous dispersion of a nonionic, water-dispersible polyurethane having pendent polyoxyethylene chains and one crosslink per 3,000 to 100,000 atomic weight units. The dispersions are useful as coating compositons.
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 June 28, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 28, 2011.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 14, 1988
GrantedJune 28, 1994
Term endedJune 28, 2011
Patent numberCA 1330466 C
Classification (IPC)C08L75/04 +2 more
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.