Granulation of phosphorus pentasulfide with a predetermined reactivity
CA 2126809 A1 · Owner: Bacardi, Jean M. · Inventors: Huey, Andrew M.; Shirley, Arthur R. Jr.; Camerer, Robert L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Uniform, free-flowing, non-friable P2S5 granules having a predetermined reactivity can be produced by accretion by spraying molten P2S5 onto cascading, smaller solid particles of P2S5. The process can be used to produce any reactivity grade of P2S5 by adjusting processing conditions. The process can also be used to produce P2S5 in a form suitable for bulk shipping.
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 June 27, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 27, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 27, 2016.
- 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.