Patent · US Expired

Nitrogen-containing heterocycles

US5389290A · kind A · utility

0Cited by

7References

9Claims

0Family size

Assignee

Merck Patent GmbH · DE

Inventors

Joachim Krause · Dieburg, DE
Rudolf Eidenschink · Mainz, DE
Klaus Bofinger · Mühltal, DE
Reinhard Hopf · Lychen, DE
Volker Reiffenrath · Roßdorf, DE
Eike Poetsch · Mühltal, DE
Bernhard Scheuble · Alsbach, DE
Thomas Geelhaar · Mainz, DE

Key dates

Filing date	Dec 17, 1991
Grant date	Feb 14, 1995
Priority date	—
Expiry date	Dec 17, 2011

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09K19/3441
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Optically active nitrogen-containing heterocycles of the formula I according to claim 1 are suitable as components for ferroelectric liquid crystalline materials.

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