Emulsified lipophilic paper sizing
CA 1069410 A · Owner: A.E. Staley Manufacturing Company · Inventors: Nevin, Charles S.; Roth, Claris D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Aqueous emulsions containing lipophilic sizing agents are used for sizing paper. Volatile nitrogen containing bases such as ammonium hydroxide and tertiary amines are used as emul-, sifying agents to aid in forming aqueous emulsions of lipophilic sizing agents. Preferred lipophilic sizing agents are heterocyclic organic compounds which are formed by the reaction of a dicarboxylic acid anhydride and a long chain hydrocarbon.
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 January 8, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 8, 1997.
- 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.