Apparatus for irradiating the bronchi of a patient for the purpose of photodyanamic therapy
CA 2033670 C · Owner: Van Den Bergh, Hubert · Inventors: Van Den Bergh, Hubert; Monnier, Philippe; Wagnieres, Georges
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus for irradiating the bronchi of a patient for the purpose of photodynamic, therapy has an optical fibre (11) that feeds the light of a laser into a bronchoscope and is, surrounded by a light-guide tube (8) and an outer tube (2). The distal end (13) of the, optical fibre (11) is embedded in a silicone composition (17) containing 7 parts per, thousand of TiO2 particles having a particle size of 0.2 µm. The silicone composition (17), fills the front end of the light-guide tube (8) as far as the end face (6) of an aluminium, cylinder (5) which acts as a mirror. The light dispersed by the TiO2 particles is emitted, radially through the light-guide tube (8) and the front …
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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 January 7, 1991 and granted November 20, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 7, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 7, 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.