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Expired, full termArchiveSolo inventor

Leaf-sight for firearms

US 1,338,121 A · Inventors: BURTON FRANK F

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Overview

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

No Claude kit for weapons

Claude doesn't help design weapons, ammunition or explosives, so this page has no Reinvent kit. To develop this one, work with a federally licensed manufacturer (many of these items are regulated) and a registered patent attorney or agent, listed on the USPTO roster.

Read the whole patent

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.

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Why it's free to use

  • Granted April 27, 1920. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by April 27, 1937.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledNovember 1, 1919
GrantedApril 27, 1920
Term endedApril 27, 1937
Application number—
Classification (CPC)F41G1/26 +2 more
Length3 pages

Timeline

Timeline From USPTO dates

192019221924192619281930193219341936Application filedNov 1, 1919Patent grantedApril 27, 1920Term endedApril 27, 1937

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.