Amine hardener for epoxy resins
CA 2380296 A1 · Owner: Gabutti, Claudio Alexander · Inventors: Wiesendanger, Rolf; Gabutti, Claudio Alexander; Fischer, Walter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to compounds of formula (Ia) or (Ib). In said formulas A represents an aliphatic, cycloaliphatic araliphatic or aromatic radical of , the value (n + 1) and n is a whole number from 0 to 5 E represents an , aliphatic, cycloaliphatic araliphatic or aromatic radical of the value (m + 1) and m is a whole number from 0 to 3 X stands for -O-, -COO-, or -CHR4-, whereby R4 and R3 together form an ethylene group R1 and R2 independently of , one another represent hydrogen or methyl R3 represents hydrogen or R3 and R4 , together form an ethylene group and R5 represents a monovalent aliphatic cycloaliphatic, araliphatic or aromatic radical. The inventive compounds are highly …
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 20, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 20, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 20, 2022.
- 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.