Stabilized monoaspartic acid esters and polyaspartic acid esters
CA 2358760 C · Owner: Groth, Stefan · Inventors: Gertzmann, Rolf; Groth, Stefan; Schmalstieg, Lutz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a composition comprising monoaspartic acid esters and polyaspartic acid esters as well as an addition product prepared from an unsaturated dicarboxilic acid compound and a thiol, a process for their production and their use as reactive , component for polyisocyanates in two-component polyurethane systems.
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 October 9, 2001 and granted December 13, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 9, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 9, 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.
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.