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Process for the production of a yellow mask image in magenta-colored photographic images

US 2,884,325 A · Inventors: OTTMAR WAHL 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 April 28, 1959. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by April 28, 1976.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledMarch 3, 1955
GrantedApril 28, 1959
Term endedApril 28, 1976
Application number—
Classification (CPC)G03C7/18
Length4 pages

Timeline

Timeline From USPTO dates

1956195919621965196819711974Application filedMarch 3, 1955Patent grantedApril 28, 1959Term endedApril 28, 1976

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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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