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Expired Canadian patentCanada

Ground water well dimensioning procedure

CA 1269865 C · Owner: Reijonen, Risto · Inventors: Reijonen, Veli E.; Reijonen, Risto

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Abstract From the Canadian patent

The present invention concerns the dimensioning of a ground water well by investigating the yield characteristics of the ground water region. The object is, with the aid of the invention to obtain as correct data as possible for ground water well dimensioning espe-, cially when the water supply of a habitation centre or of an industrial plant is concerned. The initial exploration undertaken in the ground water area for well dimensioning purposes consists of pumping runs with an observation tube in the manner of stepwise pumping, using short time intervals (15 seconds to 20 minutes) and, measuring the hydrostatic height of the water. In this way one finds the yield as a function of the level …

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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 5, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 5, 2007.
  • 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 20, 1985
GrantedJune 5, 1990
Term endedJune 5, 2007
Patent numberCA 1269865 C
Classification (IPC)E03B3/08 +2 more

Timeline

Timeline From CIPO dates

19861989199219951998200120042007Application filedNov 20, 1985Patent grantedJune 5, 1990Term endedJune 5, 2007

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