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Hopper with bottom discharge opening and means for metering the passage of granular material through said opening into a delivery conduit

US 2,594,072 A · Inventors: RIDLEY IAN M

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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 22, 1952. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by April 22, 1969.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledMarch 29, 1949
GrantedApril 22, 1952
Term endedApril 22, 1969
Application number—
Classification (CPC)B65G53/12 +1 more
Length8 pages

Timeline

Timeline From USPTO dates

1950195219541956195819601962196419661968Application filedMarch 29, 1949Patent grantedApril 22, 1952Term endedApril 22, 1969

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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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