Apparatus for homogenising the non-homogeneous light distribution of a laser beam
CA 2033124 C · Owner: Cornaz, Jean Pierre · Inventors: Wagnieres, Georges; Cornaz, Peter Francois; Van Den Bergh, Hubert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for precise, homogeneous and sharp-edged irradiation of a large area with, the light of a laser beam (5) which can be used especially for large-area photodynamic, therapy, is provided with a multimode fibre (10) which is illuminated by the , laser beam by way of a microscope objective (4) and has a length of approximatley 5 metres, and the, end face (13) of which is imaged onto an irradiated area (7) of a working surface (6) by, means of a microscope (17).
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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 December 24, 1990 and granted November 27, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 24, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 24, 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
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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.