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Method of preventing corrosion of corrosive fluid to ferrous metals

US 2,721,175 A · Inventors: LYTLE MELBA L

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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 October 18, 1955. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by October 18, 1972.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledNovember 5, 1952
GrantedOctober 18, 1955
Term endedOctober 18, 1972
Application number—
Classification (CPC)C23F11/10 +2 more
Length2 pages

Timeline

Timeline From USPTO dates

1953195519571959196119631965196719691971Application filedNov 5, 1952Patent grantedOct 18, 1955Term endedOct 18, 1972

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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