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Improved brick

US 57,461 A

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Overview

The published document from the USPTO: abstract, claims, description and drawings. Open it full size

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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 28, 1866. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by August 28, 1883.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledJune 19, 1866
GrantedAugust 28, 1866
Term endedAugust 28, 1883
Application number—
Classification (CPC)E04B1/02 +1 more
Length2 pages

Timeline

Timeline From USPTO dates

186718691871187318751877187918811883Application filedJune 19, 1866Patent grantedAug 28, 1866Term endedAug 28, 1883

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

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

Everything on this page comes from the USPTO record linked above.