Projection apparatus
CA 2065376 C · Owner: Arsenich, Svyatoslav Ivanovich · Inventors: Arsenich, Svyatoslav Ivanovich
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A projection apparatus, comprising a fiber-optical plate (1), the entrance faces (2) of the light guides (3) of which coincide with the plane (a-a) of the image of the original, and a projection objective (8), the exit faces (9) of the light guides (3) of the fiber-optical plate (1) being disposed in the field of view thereof. An optical system (10) for concentrating the light rays into a light beam and directing that light beam into the entrance pupil (11) of the projection objective (8) is formed along the path of propagation of the light rays in each of the light guides (3) of the fiber-optical plate (1). The optical system (10) is formed by a focon (12), positive lens (13) and …
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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 June 28, 1991 and granted June 8, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 28, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 28, 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.