Patent Yard Sign in
Expired, full termArchiveSolo inventor

Method of hardening the bores of cylindrical members

US 2,926,112 A · Inventors: HIGHFIELD FRANK W W

USPTO PDF

Overview

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

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, and the Claude kit works from them.

Google PatentsUSPTO PDF

Why it's free to use

  • Granted February 23, 1960. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by February 23, 1977.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledJanuary 16, 1958
GrantedFebruary 23, 1960
Term endedFebruary 23, 1977
Application number—
Classification (CPC)C21D9/14
Length7 pages

Timeline

Timeline From USPTO dates

1959196119631965196719691971197319751977Application filedJan 16, 1958Patent grantedFeb 23, 1960Term endedFeb 23, 1977

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.