Jet ink for offset printing master
CA 2107980 A1 · Owner: Man Roland Druckmaschinen Ag · Inventors: Treleaven, Richard J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An aqueous based ink composition that contains polymers which can be crosslinked by the application of heat such that the cross-linked resultant deposit is used to produce a cohesive matrix that is resistant to an acidic fountain solution of an offset printing process. The cross-linked composition includes a first polymer containing a cyclic anhydride or derivative thereof and a second polymer that contains hydroxyl functionality. The cyclic anhydride may be a styrene maleic anhydride or derivative thereof or a methyl vinyl ether/maleic anhydride or derivative thereof. The hydroxyl containing second polymer may be a polyethylene or polypropylene glycol, a hydroxyalkylated polyethyleneimine …
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 October 7, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 7, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 7, 2015.
- 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.