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Expired Canadian patentCanada

Control system for prilling tools

CA 1206229 A · Owner: The Babcock & Wilcox Company · Inventors: Agarwal, Suresh C.

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

An apparatus and method for controlling moisture content of prilled products which are produced by air drying a spray of the liquid product, comprises a vessel for receiving a flow of air and a flow of the liquid product a supply line, for supplying air to the vessel and a supply line for supplying liquid product to the vessel. The product is advantageously a solution of urea. Moisture content is measured or inferred for the product flow, the input air and the air coming out of the vessel. An air flow controller is connected for controlling the flow of air into the vessel which controller is itself controlled by a circuit that calculates a desired air input flow rate for a selected moisture …

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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

  • Granted June 17, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 17, 2003.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 14, 1983
GrantedJune 17, 1986
Term endedJune 17, 2003
Patent numberCA 1206229 A
Classification (IPC)B01J2/04 +2 more

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedSep 14, 1983Patent grantedJune 17, 1986Term endedJune 17, 2003

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.