Thermally-transferable fluorescent compounds
CA 2004697 A1 · Owner: Henzel, Richard P. · Inventors: Henzel, Richard P.; Byers, Gary W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, A donor element for thermal transfer comprising a support having on one side thereof a fluorescent derivative of a 1.8-naphthalimide compound dispersed in a polymeric binder and on the, other side thereof a slipping layer comprising a lubricant. In a preferred embodiment, the compound has the formula:, wherein: R is hydrogen; a substituted or unsubstituted alkyl group of 1 to about 6 carbon atoms; or a carbocyclic or, heterocyclic ring of about 5 to about 10 atoms; and, D is a monovalent, nonionic nonquenching, moiety.
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 December 6, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 6, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 6, 2011.
- 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.