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Quaternary ammonium aliphatic imides

US 3,407,204 A · Inventors: GRIFFIN SHAY E et al.

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  • Granted October 22, 1968. A patent granted before 1976 lasted at most 17 years from grant, so its term ended by October 22, 1985.
  • We check US rights only. Old patents can still inspire new ones: improvements may be patentable.
FiledMarch 14, 1967
GrantedOctober 22, 1968
Term endedOctober 22, 1985
Application number—
Classification (CPC)C07D207/404 +2 more
Length3 pages

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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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