Process for producing pvp-h2o2 products
CA 2106375 A1 · Owner: Merianos, John J. · Inventors: Cohen, Jeffrey M.; Taylor, Paul D.; Merianos, John J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the production of PVP-H2O2 products in the form of free-flowing powders, or a free-standing porous solid or, foam, is described. To prepare free-flowing powders a fluidized bed, is maintained at a reaction temperature of about room temperature to 60 ·C and is contacted with finely divided droplets of a 30 to 85 % by weigth aqueous H2O2 solution. Preferably the fluidized bed temperature is about 35·-45 ·C a 5-70 % H2O2, solution is used, and the feed rate of introduction of the H2O2 solution is about 5-50 g/minute/kg PVP present. The PVP-H2O2 product preferably contains about 15-24 % preferably 18-22 %, H2O2 (1:1 molar ratio) and less than about 5 % water.
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 March 23, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 23, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 23, 2014.
- 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.