Method of extending the useful life and enhancing performance of lithographic printing plates
CA 2104769 C · Owner: Lewis, Thomas E. · Inventors: Lewis, Thomas E.; Nowak, Michael T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of extending the useful life and/or enhancing the performance of wet or dry lithographic printing plates. A strong curable composition that adheres to the ink-receptive plate areas is first applied to an imaged plate. After removal of the composition from non-image plate areas it is cured, thereby augmenting the resilience of the ink-receptive plate areas. If imaging of the plate results in surface recesses the cured composition can enhance plate performance by making the entire surface co-planar.
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 30, 1991 and granted July 7, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 30, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 30, 2013.
- 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.