Process for preparing pvp-iodine complex
CA 1102492 A · Owner: G A F Corporation · Inventors: Lorenz, Donald H.; Williams, Earl P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In accordance with the present invention there, is provided herein an in situ process for making stable PVP-iodine complex having a high level of iodine power. The process of this invention is carried out by adding a pre-determined amount of free water to a PVP suspension and admixing iodine therewith to form the desired solid complex. The PVP suspension may be obtained by suspension polymerization of N-vinylpyrrolidone (VP) in a suitable solvent, and used directly for succeeding steps of the process.
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
- Granted June 2, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 2, 1998.
- 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.