Unfortified liquid paper sizing composition and method of preparation
CA 1270605 C · Owner: Monsanto, Company · Inventors: Peltier, Thomas L.; Abell, Steven
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A tall oil rosin paper sizing composition comprising a homogeneous aqueous liquid which is fully miscible with water at 5°C. On a solids basis the, composition contains between about 15% and about 75% by weight of an alkali metal soap of a condensation product of tall oil rosin and an aldehyde and between, about 85% and about 25% by weight urea. Also disclosed are methods for preparation and use of the novel paper sizing composition.
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 June 26, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 26, 2007.
- 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.