Polyamide resins based on dimerized fatty acids, process for producing them, and process for manufacturing printing inks by the use of said polyamide resins
CA 2018315 C · Owner: Krase, Horst · Inventors: Drawert, Manfred; Krase, Horst
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to polyamide resins and to their use as vehicles in the manufacture of printing inks. These poly-amide resins can be obtained by condensation of dimeric fatty acids, monomeric fatty acids, ethylenediamine, and adducts con-taining amino groups and prepared from aromatic or cycloaliphatic glycidyl ethers and amines containing primary amino groups.
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 June 5, 1990 and granted March 11, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 5, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 5, 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.
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.