Process for the preparation of hypoallergenic major birch pollen allergen rbet v 1
CA 2477409 C · Owner: Cromwell, Oliver · Inventors: Suck, Roland; Fiebig, Helmut; Cromwell, Oliver
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method for producing hypoallergenic major birch pollen allergens by means of at least one chromatographic clean-up step using , essentially non-buffered aqueous bases as mobile solvents followed by , neutralisation. The hypoallergenic major birch pollen allergens are characterised by a lack of, or at least reduced immunoglobulin-E binding and , simultaneous therapeutically relevant T-cell stimulation. Said allergens can thus be used in specific immunotherapy as therapeutic agents having few side effects.
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 February 7, 2003 and granted January 27, 2015. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 7, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 7, 2025.
- 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.