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Process for the manufacture of articles which are made of iron or steel and are threaed or possess surfaces which make tight joints

US 2,236,209 A · Inventors: KARL DAEVES et al.

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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 March 25, 1941. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by March 25, 1958.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledMay 10, 1938
GrantedMarch 25, 1941
Term endedMarch 25, 1958
Application number—
Classification (CPC)C22C38/18 +1 more
Length2 pages

Timeline

Timeline From USPTO dates

1939194119431945194719491951195319551957Application filedMay 10, 1938Patent grantedMarch 25, 1941Term endedMarch 25, 1958

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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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