Dialdehyde treatment of tetanus toxin and derivative obtained
CA 1066621 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
Abstract of the Disclosure, The present invention relates to derivatives: of tetanus toxin, a process for their preparation by treating an aqueous solution of tetanus toxin with an aliphatic mono- or dialdehyde reacting the toxin before or after the aldehyde treatment in the presence of a compound reducing disulfide bridges with a denaturing agent, obtaining the derivative of the light chain in the presence of the denaturing agent by way of proteinchemical isolation processes and suitably separating it from the denaturing agent, and compositions containing them. 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 November 20, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 20, 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.