Derivatives of the tetanus toxin, process for their preparation and agents containing them
CA 1063021 A · Owner: Behringwerke Aktiengesellschaft · Inventors: Helting, Torsten B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention is directed to a process for the preparation of a modified derivative of the light chain tetanus toxin in which the light chain of tetanus toxin free from denaturing agent is mixed with an aliphatic mono- or di-aldehyde having a chain length of from 1 to 6 carbon atoms, up to an aldehyde concentration of from 0.05 mole to 0.2 mole. The mixture is then allowed to stand for 14 to 28 days at a temperature of from 20 to 37°C the aldehyde, is eliminated and the modified derivative of the light chain is obtained. The invention is also directed to the product prepared according to this process. The products of the invention are useful in the preparation of tetanus vaccines.
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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 September 25, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 25, 1996.
- 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.