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Priority claimed from US242895Aexternal-prioritypatent/US3207713A/en
Priority claimed from US292071Aexternal-prioritypatent/US3316221A/en
Application filed by Du PontfiledCriticalDu Pont
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Publication of DK107978CpublicationCriticalpatent/DK107978C/en
Process for the preparation of 5-sulfonylpropyl- or 5-sulfonylpropylidene-5H-dibenzo- [a, d] -cycloheptenes or -5H-dibenzo- [a, d] -10,11-dihydrocycloheptenes.