Method for controlled production of ultrafine microparticles and nanoparticles
CA 2375992 C · Owner: Muller, Rainer Helmut · Inventors: Mader, Karsten; Krause, Karsten; Muller, Rainer Helmut
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns ultrafine microparticles and nanoparticles and a , method for controlled production thereof in the absence of or with minimum water, in the absence of plasticizers or under reduced temperature constraint. The method is characterised in that it consists in subjecting a matrix material to a high pressure homogenising process in an anhydrous or dry or low temperature medium, preferably at room temperature (20~C) and in particular below the freezing point of water. Said process brings about controlled fine grinding and reduces to a minimum the damaging influence of the chemical stability of the homogenised material.
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 July 10, 2000 and granted May 27, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 10, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 10, 2022.
- 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.