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Process for obtaining potash values from potash ore

US 3,380,666 A · Inventors: BARNHILL JR KENNETH S

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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, 1968. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by April 30, 1985.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledAugust 9, 1965
GrantedApril 30, 1968
Term endedApril 30, 1985
Application number—
Classification (CPC)B03D1/06
Length2 pages

Timeline

Timeline From USPTO dates

1966196819701972197419761978198019821984Application filedAug 9, 1965Patent grantedApril 30, 1968Term endedApril 30, 1985

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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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