Soybean oil-based intaglio ink and method for making same
CA 2177804 C · Owner: Moynihan, John T. · Inventors: Moynihan, John T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is an intaglio ink comprising a varnish comprising an alkyd-modified soybean oil and method for producing same. Preferably the alkyd-modified soybean oil is, made by combining soybean oil pentaerythiol and trimellitic anhydride at elevated temperature. The varnish may further comprise a thermoplastic phenolic resin. Methods of making the alkyd modified soybean oil, thermoplastic phenolic resin the varnish and the ink, are also disclosed.
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 30, 1996 and granted January 4, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 30, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 30, 2018.
- 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.