Radiation-curable protective coating composition
CA 1296441 C · Owner: Klun, Thomas P. · Inventors: Lu, David D.; Robbins, Aida F.; Klun, Thomas P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Normally solid, organic solvent-soluble thermoplastic, polyethylenically-unsaturated cellulosic, polyurethane polymers are provided. These cellulosic polyurethane polymers comprise one or more cellulose ether or ester segments, one or more alkylene moieties having at least two carbon atoms and which can be substituted or interrupted by ether oxygen atoms, ester groups or, phenylene groups, two or more residues of diisocyanates the, segments, moieties, and residues being linked together by linking groups with the proviso that said alkylene moietiQs contain sufficient ethylenic unsaturation that said polymer can be crosslinked to a solvent-insoluble state. The cellulosic polyurethane polymers …
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
- Granted February 25, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 25, 2009.
- 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.