Use of 1,2-benzopyrone derivatives for the treatment of malignant tumours in humans
CA 2045593 C · Owner: Thornes, R. Douglas · Inventors: Marshall, Ernest; Thornes, R. Douglas; Stolze, Helga
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to the use of 1,2-benzopyrone derivatives for the treatment of malignant tumors in human beings. The derivatives used according to the invention are suitable for both preventive and also therapeutic treatment and they display in particular growth-inhibiting effect vis-à-vis brain-tumor cells and cells from human renal, prostate, skin or lung carcinomas.
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 November 23, 1990 and granted September 5, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 23, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 23, 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
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.