Device and method for photodynamic therapy of the nasopharyngeal cavity
CA 2591086 C · Owner: Tan, Bing · Inventors: Sterenborg, H.J.C.M.; Levendag, Peter C.; Tan, Bing
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device/system and method for the delivery of light to the nasopharyngeal cavity in a controlled and reproducible mariner using at least one optical fiber having a linear diffusing tip, a spherical diffusing tip or a bare cut , end is disclosed. A positioning device may have one or two flexible guide tubes that are attached to a preformed shaped base that is introduced into the nasopharyngeal cavity to guide and position the optical fibers and/or detector(s). The optical fibers are enclosed within shielding tubes which are inserted into the guide tubes. The optical fibers may be further moved within the shielding tube so as to adjust the amount of output light. Also included within …
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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 November 17, 2005 and granted November 5, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 17, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.