Patent · US Expired

Process for the purification of bisphenols

US5269887A · kind A · utility

16Cited by

18References

3Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Wolfgang Jakob · Moers, DE
Manfred Schmidt · Krefeld, DE
Dieter Freitag · Krefeld, DE
Klaus Berg · Krefeld, DE

Key dates

Filing date	Feb 10, 1992
Grant date	Dec 14, 1993
Priority date	—
Expiry date	Feb 10, 2012

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C37/74
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A process for the purification of bisphenols by distillation.

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