Device and method for the photodynamic diagnosis of tumor tissue
CA 2441107 C · Owner: Grissom, Charles B. · Inventors: Mcgreevy, James; Cannon, Michelle; Grissom, Charles B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus that includes a surgical telescopic device having a distal end and a proximal end; a camera coupled to the proximal end of the surgical telescopic device; and a holographic notch filter interposed between the camera and the proximal end of the surgical telescopic device. The camera preferably is a charge-coupled-device camera ("CCD camera"). The apparatus may also include a focusing lens or an alternative type of filter such as a longpass filter or an infrared filter. The surgical telescopic device may be used by illuminating the material with non-white light and detecting the emitted fluorescence, phosphorescence or luminescence.
Read the whole patent
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 March 15, 2002 and granted June 5, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 15, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 15, 2024.
- 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.