Polyetheralkanolamine dispersants
CA 2565138 C · Owner: Whewell, Christopher J. · Inventors: Klein, Howard P.; Whewell, Christopher J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides water-soluble products formed by reacting a monofunctional, amine-terminated polyether with a glycidyl ether of a polyol which products are useful as dispersants in end uses and formulations known to employ dispersants. The invention also provides processes which comprises reacting a monofunctional, amine-terminated polyether with a glycidyl ether of a polyol.
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 May 10, 2005 and granted September 11, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 10, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.