Patent · US Expired

Organic compounds

US4033979A · kind A · utility

2Cited by
2References
8Claims
0Family size

Assignee

Inventors

Key dates

Filing dateJan 21, 1976
Grant dateJul 5, 1977
Priority date—
Expiry dateJan 21, 1996

Classification

  • Technology area (CPC C)Chemistry; Metallurgy
  • CPC primaryC07D499/00
  • WIPO fieldOrganic fine chemistry
  • WIPO sectorChemistry

Abstract

Intermediates useful in the preparation of compounds having a penam or cephem ring structure, particularly penicillins and cephalosporins, and their preparation.

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