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Colloidal mills of the multiple grinding unit type

US 2,437,147 A · Inventors: ZWOYER ELLSWORTH B 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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  • Granted March 2, 1948. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by March 2, 1965.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledMay 12, 1944
GrantedMarch 2, 1948
Term endedMarch 2, 1965
Application number—
Classification (CPC)B02C7/14
Length7 pages

Timeline

Timeline From USPTO dates

1945194819511954195719601963Application filedMay 12, 1944Patent grantedMarch 2, 1948Term endedMarch 2, 1965

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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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