Water-resistant surface coating formulations and paper coated therewith
CA 2124022 A1 · Owner: Matsubara, Tsugio · Inventors: Tsutsumi, Haruki; Matsubara, Tsugio; Ikemoto, Yoshiaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a water-resistant surface coating formulation comprising a reaction product obtained by subjecting an acrylamide polymer to a crosslinking reaction with 0.1 to 20 parts by mole per, 100 parts by mole of amido groups in the acrylamide polymer, of a glyoxalmonoureine; a method for improving the water resistance of paper by using the formulation; and coated paper so obtained. As a result of improved water resistance of the coating formulation this in-, vention makes it possible to conduct coating work stably.
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 20, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 20, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 20, 2016.
- 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.