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Process for producing alloys containing zirconium

US 2,235,508 A · Inventors: VON ZEPPELIN HELMUT 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 18, 1941. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by March 18, 1958.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledJanuary 18, 1940
GrantedMarch 18, 1941
Term endedMarch 18, 1958
Application number—
Classification (CPC)C22B5/04 +2 more
Length2 pages

Timeline

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194119431945194719491951195319551957Application filedJan 18, 1940Patent grantedMarch 18, 1941Term endedMarch 18, 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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Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.comJustia PatentsFull text, claims and classification.patents.justia.comFreePatentsOnlineFull text and PDF.freepatentsonline.comEspacenetForeign family and legal status.European Patent Office

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