Damping-solution concentrate and damping solution and use thereof in the offset printing process
CA 2071442 C · Owner: Laufs, Fritz · Inventors: Laufs, Fritz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a damping solution concentrate that basically contains, a) 1-15% by weight of buffer substances; b) 2-20% by weight of an additive, consisting of one or more of the substances: water-soluble polysaccharides polyglycols and polyhydric alcohols;, c) 2-10% by weight of preserving agent; d) 0.01-5% by weight of non-ionic, low-foam tenside consisting of one or several of the substances: tertiary acetylene glycol, ethylene oxide tensides propylene oxide tensides, fatty alcohol ethoxylates fatty acid ethoxylates and siloxane alcoxylates; e) 1-35% by weight of a compound of the formulation C4H9-O-CH2-CH2-On-H, whereby n signifies an integer of 1 to 10 or a mixture of these …
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 June 17, 1992 and granted September 6, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 17, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 17, 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.