Display element of transparent plastic with fluorescent colorant
CA 2070662 A1 · Owner: Cohen, Henri · Inventors: Cohen, Henri; Schoppen, Remco Sytze; Willemsen, Gertjan Rob
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention provides an element for displaying one or more portions of characters or shapes, wherein the display element comprises partially transparent plastic in which fluorescent colorant is incorporated. Preferably the inside of one head end is provided with a profiled form.
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 October 8, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended October 8, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 8, 2012.
- 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.