Manufacturing methods, based on non aqueous dispersion techniques, to produce spherical polyester particles with narrow particle size distributions and tailorable mean particle sizes
CA 2324564 A1 · Owner: Ticona Gmbh · Inventors: Wulf, Stefan; Shiwaku, Toshio; Ward, Bennett Clayton
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a process for the production of spherical polyester , particles, wherein the particle size can be exactly adjusted in the range of 1 to 200 µm and a particle size distribution with a span (=d90-d10/d50)1.5 as well as the use of the produced particles for toner compositions in electrophotographic and direct printing systems and powder coatings.
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 17, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 17, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 17, 2021.
- 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.