Fluid optics projector
CA 2111020 C · Owner: Amblard, Jean-Claude · Inventors: Georget, Jean; Vide-Amblard, Amilcar; Amblard, Jean-Claude
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device for trapping all available light and organizing it into any given beam by means of an optical device which by forcing a fluid to rotate in a suitably-shaped space (1) (revolution or non-revolution of a logarithmic spiral arc) enables a temperature gradient to be created thus causing a refractive index gradient to be maintained in a fluid chosen for its ability to transmit or absorb part of the light flux according to the wavelength thereof. All the light may be concentrated and channeled in the desired direction while the heat energy not needed for visual projection is removed. A spotlight or still picture projector having excellent optical efficiency (no heat-absorbing glass) and …
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 March 30, 1993 and granted February 16, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 30, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 30, 2015.
- 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.