Sizing agent suitable for use in paper making
CA 1252602 A · Owner: Nippon Mitsubishi Oil Corporation · Inventors: Yokota, Kinya; Ichihara, Akinobu; Tanakamaru, Yasuharu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A composition useful as a paper sizing agent comprising a substituted succinic anhydride of the formula:, wherein R is a hydrocarbon group having at least 6 carbon atoms selected from the group consisting of an alkyl group, an alkenyl group, an aralkyl group or an aralkenyl group, and a non-ionic surface active agent having a terminal hydroxyl group bonding to tertiary carbon. The composition has excellent storage stability and can, exhibit an excellent sizing effect even if stored for a long term.
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
- Granted April 18, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 18, 2006.
- 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.