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Tube mill lining

US 2,274,331 A · Inventors: HOWES WARREN L

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3 drawing sheets

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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 February 24, 1942. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by February 24, 1959.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledFebruary 19, 1941
GrantedFebruary 24, 1942
Term endedFebruary 24, 1959
Application number—
Classification (CPC)B02C17/22
Length6 pages

Sources & verification

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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