Porphyrins and cancer treatment
CA 1338737 C · Owner: Scotia Holdings Plc · Inventors: Bonnett, Raymond; Berenbaum, Morris Cyril
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention provides novel compounds for therapy of tumours susceptible to necrosis when an appropriate compound is administered followed by illumination with light of a wavelength absorbed by the compound, the compounds being dihydro porphyrins of the formula, or the corresponding tetra-hydro porphyrins: IV, where n = 1 to 3 and each substituent R the same or, different and at the same or different position in its respective substituent phenyl ring, is an hydroxy group.
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
- Granted November 26, 1996. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 26, 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.