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Expired Canadian patentCanada

Ripple-free flow, accurate mix, and automated spray system

CA 1300988 C · Owner: Dykmans, Maximiliaan Jacobus · Inventors: Dykmans, Maximiliaan Jacobus

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

Processes and apparatus for the construction of improved tank structures employing pump metering and delivery system which accurately meters, mixes and evenly sprays composite materials to form the walls of tanks or containment vessels. Such systems have specific application to the construction of walls of prestressed tanks formed by inflating a membrane and applying rigidifying material outwardly of said membrane and then prestressing the walls by circumferentially wrapping prestressing material around the same. Promoters, catalyst and other, chemicals are used to create composite walls each feeding into, individual pump systems comprised of at least two hydraulic cylinders connected to …

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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 May 19, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 19, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 16, 1988
GrantedMay 19, 1992
Term endedMay 19, 2009
Patent numberCA 1300988 C
Classification (IPC)B05D1/02 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedMay 16, 1988Patent grantedMay 19, 1992Term endedMay 19, 2009

Sources & verification

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