Patent · US Expired

3-Keto-19-nor-.DELTA.4,9-steroids

US4477445A · kind A · utility

39Cited by
1References
31Claims
0Family size

Assignee

Inventors

Key dates

Filing dateFeb 23, 1983
Grant dateOct 16, 1984
Priority date—
Expiry dateFeb 23, 2003

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC07J71/001
  • WIPO fieldOrganic fine chemistry
  • WIPO sectorChemistry

Abstract

Novel 3-keto-19-nor-.DELTA.4,9-steroids of the formula ##STR1##

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.