Improved alkanolamides
CA 2323461 C · Owner: Katstra, Richard D. · Inventors: Perella, James E.; Katstra, Richard D.; Fost, Dennis L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Improved modified monoethanolamide compositions are provided which may be represented by formula (I), wherein: R is optionally substituted or unsubstituted, branched or straight chain saturated or , unsaturated hydrocarbon radical of 3-21 carbon atoms; B is CH3 or -CH2 -CH3; and x is from 1 to 6; wherein the modified monoethanolamide compositions, which are liquid at ambient temperatures or lower, exhibit surfactant properties substantially the same as those exhibited by diethanolamides such as foam stabilization and viscosity building as well as other desirable characteristics.
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 March 10, 1999 and granted April 29, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 10, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 10, 2021.
- 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.