Widely-bridged alcohol polyethoxylates and their use
CA 2239544 A1 · Owner: Albemarle Corporation · Inventors: Magin, Ralph W.; Sauer, Joe D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Described are.omega..omega.'-.alpha..omega.-alkanediylbis(alkylimino)bis(alkanolpollyethoxylates) in which (i) the alkane group has in the range of 4 to 12 carbon atoms, (ii) the alkyl groups can be the same or different and are primary alkyl groups which contains 6 to 24 carbon atoms each (iii) each alkanol group contains, independently in the range of from 2 to 6 carbon atoms and (iv) the number of ethyleneoxy groups in each polyethoxylate group is in the range of 2 to 50. These compounds are effective adjuvants for use with pesticides especially herbicides, and plant growth regulants such as glyphosate.
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 September 26, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 26, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 26, 2019.
- 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.