Computer-controlled spray-drying process
CA 2034208 C · Owner: Kerslake, Andrew J. · Inventors: Kerslake, Andrew J.; Proudfoot, Christopher G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In an automated spray-drying process the moisture content of the powder obtained is automatically maintained at a pre-set level by measuring its actual value and feeding it to a computer which at least controls the flow of drying air and/or the temperature thereof as a function of past values of said flow and/or temperature, and as a function of current and past values of the moisture content. Preferably the, flow of drying air and/or the temperature thereof is also regulated as a function of current and past values of the slurry flow rate. The process is especially suitable for the manufacture of detergent powders or components thereof.
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 January 15, 1991 and granted June 30, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 15, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 15, 2013.
- 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.