Expired Canadian patentCanada
Reaction products of aminoalkylene polycarboxylic acids with secondary amines and middle distillate compositions containing the aforesaid
CA 2017126 C · Owner: Oppenlaender, Knut · Inventors: Wegner, Brigitte; Buettner, Egon; Schwartz, Erich
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel reaction products of aminoalkylene polycarboxylic acids with secondary amines and their use as additives to middle distillates together with conventional ethylene copolymers as flow improvers and conductivity improves.
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 18, 1990 and granted December 7, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 18, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 18, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 18, 1990
GrantedDecember 7, 1999
Term endedMay 18, 2010
Patent numberCA 2017126 C
Classification (IPC)C10L1/22 +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.