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Prevention of pitting of steam boilers

US 2,229,675 A · Inventors: SCHMID JULIAN W

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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 January 28, 1941. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by January 28, 1958.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledJanuary 30, 1939
GrantedJanuary 28, 1941
Term endedJanuary 28, 1958
Application number—
Classification (CPC)F22D11/00
Length5 pages

Timeline

Timeline From USPTO dates

1940194219441946194819501952195419561958Application filedJan 30, 1939Patent grantedJan 28, 1941Term endedJan 28, 1958

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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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