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Means and method for stimulating the flow of well fluids and for declogging well bore walls and well casing perforations

US 2,790,388 A · Inventors: MACLEOD NORMAN A

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Listed from its USPTO record in Patent Yard's full-term archive. Its claims, description and drawings are in the USPTO PDF and on Google Patents, and the Claude kit works from them.

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Why it's free to use

  • Granted April 30, 1957. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by April 30, 1974.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledApril 21, 1949
GrantedApril 30, 1957
Term endedApril 30, 1974
Application number—
Classification (CPC)E21B37/00
Length6 pages

Timeline

Timeline From USPTO dates

195019531956195919621965196819711974Application filedApril 21, 1949Patent grantedApril 30, 1957Term endedApril 30, 1974

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Full published documentText and every drawing sheet as a PDF.USPTOFile historyStatus, office actions, notices, fee records and petitions.USPTO Patent CenterPatent Public Search recordSearchable full text and bibliographic data.USPTO

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