Full spectrum polarized lighting system
CA 2036518 C · Owner: Karpen, Daniel Nathan · Inventors: Karpen, Daniel Nathan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A full spectrum polarized lighting fixture for general commercial, institutional, and industrial use and for offices, with computer terminals or video display terminals. The lighting fixture contains an electronic solid state ballast a polarizing, lense, and a full spectrum color corrected lamp. The ballast may be dimmed either manually with a manual dimmer switch automatically, with a photocell against available daylight or by means of, a digital low voltage signat generated by an energy management system. The lense is a polarized diffuser to provide glare free light With excellent contrast. The fixture contains a full spectrum color corrected lamp to simulate daylight. The combination of …
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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 February 18, 1991 and granted September 9, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 18, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 18, 2013.
- 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.