Process for sizing cellulose fibres
CA 1074507 A · Owner: Kemanord Ab · Inventors: Ekengren, Turid; Bjorklund, James A. C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Process for sizing cellulose fibers or cellulose fibre containing materials to improve the resistance thereof to water which comprises applying to the cellulose fibres or fibres containing material a compound of the formula, wherein X represents are groups R3R4N- or R5O-; R1 represents an organic, hydrophobic group having 8 to 40 carbon atoms and R2, R3, R4 and R5 are each independantly alkyl groups of 1 to 7 carbon atoms, or are the same as R1.
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 1, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 1, 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.