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Expired Canadian patentCanada

Apparatus for delivering accurate volume of liquid

CA 1235465 A · Owner: E. I. Du Pont De Nemours And Company · Inventors: Falcoff, Allan F.

CIPO record

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

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Abstract From the Canadian patent

TITLE, Apparatus for Delivering, Accurate Volume of Liquid ABSTRACT, An apparatus for delivering an accurate volume of fluid from a supply vessel to a mixing vessel in which a piston pump or gear pump is driven by a mar controlled by a motor controller amplifier coupled to a computer which allows the pump to be driven an exact number of strokes or revolutions to move the desired amount of liquid from the supply vessel to a mixing vessel. The apparatus is particularly useful in mixing paints wherein accurate amounts of mill bases are required to be added to achieve a desired paint color.

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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 April 19, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 19, 2005.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 22, 1983
GrantedApril 19, 1988
Term endedApril 19, 2005
Patent numberCA 1235465 A
Classification (IPC)B67D7/14

Timeline

Timeline From CIPO dates

19841987199019931996199920022005Application filedNov 22, 1983Patent grantedApril 19, 1988Term endedApril 19, 2005

Sources & verification

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