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Photographic emulsions sensitized with merocyanine dyes containing a 5(4)-thiazolone nucleus

US 2,692,829 A · Inventors: KNOTT EDWARD B et al.

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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 October 26, 1954. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by October 26, 1971.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledFebruary 17, 1951
GrantedOctober 26, 1954
Term endedOctober 26, 1971
Application number—
Classification (CPC)G03C1/22 +1 more
Length13 pages

Timeline

Timeline From USPTO dates

1952195419561958196019621964196619681970Application filedFeb 17, 1951Patent grantedOct 26, 1954Term endedOct 26, 1971

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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

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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

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