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Apparatus for automatically counting the volumes of granulous materials passing through the same

US 1,752,602 A · Inventors: ALBERT LETREUX

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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 1, 1930. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by April 1, 1947.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledJuly 18, 1927
GrantedApril 1, 1930
Term endedApril 1, 1947
Application number—
Classification (CPC)G01F3/28
Length4 pages

Timeline

Timeline From USPTO dates

1928193019321934193619381940194219441946Application filedJuly 18, 1927Patent grantedApril 1, 1930Term endedApril 1, 1947

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Official USPTO records

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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