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Photographic emulsions containing a pyrimidinedione and a desensitizing nucleus linked by a dimethine or a double bond

US 3,528,811 A · Inventors: WEBSTER FRANK G 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 September 15, 1970. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by September 15, 1987.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
Filed—
GrantedSeptember 15, 1970
Term endedSeptember 15, 1987
Application number—
Classification (CPC)G03C1/4853 +1 more
Length9 pages

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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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