Treated papers
CA 2031919 C · Owner: Jones, Arthur Y. · Inventors: Malhotra, Shadi L.; Rutland, David F.; Jones, Arthur Y.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A paper comprised of a supporting substrate with a coating comprised of a desizing component and a hydrophilic polymer and more, specifically in an embodiment the paper is comprised of a paper comprised of a supporting substrate treated with desizing agents selected from the group consisting of (1) hydrophilic poly(dialkylsiloxanes); (2) poly(alkylene glycol); (3) poly(propylene oxide) - poly(ethylene oxide) copolymers; (4) fatty ester modified compounds of phosphate sorbitan, glycerol, poly(ethylene glycol) sulfosuccinic acid, sulfonic acid and alkyl amine; (5) poly(oxyalkylene) modified compounds of sorbitan esters fatty amines, a!!kanol amides, castor oil fatty acids and fatty alcohols; …
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 December 10, 1990 and granted January 30, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 10, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 10, 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.