Printing process and pretreatment composition
CA 2078581 A1 · Owner: Imperial Chemical Industries Plc · Inventors: Aston, Sarah Olivia; Provost, John Reginald
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A colour enhancing agent comprising water urea and a, quaternary ammonium compound of the Formula (1): ( l ), wherein:, R1 , R2 and R3 are each independently selected from H and C1-20optionally substituted alkyl or alkylene; R4 is C1-20-optionally substituted alkyl or alkylene; and X- is an anion, provided that the total number of carbon atoms in the compound of Formula (1) is more than 30. The colour enhancing agent can be used in pre-treatment compositions for textile materials prior to ink jet printing with a reactive dye and improves colour yields.
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 September 18, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 18, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 18, 2014.
- 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.