Patent Yard Sign in
Expired, full termArchiveSolo inventor

Light sensitive composition containing a heterocyclic photoactivator having an -n+=c- group in the heterocyclic ring alkyl thereof and the photographic use thereof

US 3,547,634 A · Inventors: HOSHINO SHOICHIRO et al.

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 December 15, 1970. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by December 15, 1987.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledOctober 26, 1966
GrantedDecember 15, 1970
Term endedDecember 15, 1987
Application number—
Classification (CPC)G03C1/73
Length5 pages

Timeline

Timeline From USPTO dates

1967197019731976197919821985Application filedOct 26, 1966Patent grantedDec 15, 1970Term endedDec 15, 1987

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.