Aqueous developable imaging systems
CA 2066895 A1 · Owner: Lundquist, Wallace R. · Inventors: Heller, Michael B.; Klun, Thomas P.; Lundquist, Wallace R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure Solvent soluble, aqueous developable positive or negative acting photosensitive media comprising a pigment and acid-modified polyvinylacetal substantially free of chlorinated orgnic solvent. These media are particularly useful in the construction of prepress color proofing systems.
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 April 23, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 23, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 23, 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.