Canadian application, no grantCanada
(meth)acrylic acid derivatives and their polymers suitable for use in the manufacture of paper
CA 2416261 A1 · Owner: Mohammed, Amjad Mohmood · Inventors: Singh, Michael; Mohammed, Amjad Mohmood
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds of formula (1) containing sterically hindered groups polymers , thereof and the use of these polymers in papermaking processes and dewatering processes.
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 July 27, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 27, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 27, 2023.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 27, 2001
GrantedNo grant recorded
Term endedJuly 27, 2021
Patent numberCA 2416261 A1
Classification (IPC)C07D295/08 +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.