The use of alkyl hydrogen fumarates for treating psoriasis, psoriatic arthritis, neurodermatitis and enteritis regionalis crohn
CA 2283915 C · Owner: Biogen International Gmbh · Inventors: Joshi, Rajendra K.; Strebel, Hans-Peter
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The use of one or several alkyl hydrogen fumarates of the general formula, (see formula I), wherein R is a C1-5 alkyl optionally in admixture with, dialkyl fumarate of the formula (see formula II), and optionally customary pharmaceutical excipients and carriers for preparing a pharmaceutical composition in the form of micro-tablets or micro-pellets for treating psoriasis, psoriatic arthritis, neurodermatitis and enteritis regionalis Crohn.
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 December 8, 1998 and granted December 3, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 8, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 8, 2020.
- 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.