Heteric eo/po block copolymers as adjuvants for pesticidal formulations
CA 2177526 C · Owner: Basf Corporation · Inventors: Utz, Christopher G.; Poucher, Donald A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to the use of liquid heteric EO/PO wherein EO is ethylene oxide and PO is propylene oxide block, copolymers, containing at least 30% by weight EO as a tank mix, adjuvant for enhancing the weed killing activit.y of herbicidal formulations.
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 28, 1996 and granted August 3, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 28, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 28, 2018.
- 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.