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Expired, full termArchiveSolo inventor

Baffling and separating structure

US 1,637,372 A · Inventors: ESCHHOLZ OTTO H

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2 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 August 2, 1927. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by August 2, 1944.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledFebruary 8, 1923
GrantedAugust 2, 1927
Term endedAugust 2, 1944
Application number—
Classification (CPC)H01H33/57
Length5 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

Cross-check elsewhere

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