Patent · US Expired

Process for the preparation of asymmetrically substituted ureas

US5043444A · kind A · utility

3Cited by

3References

10Claims

0Family size

Assignee

Chemie Linz Gesellschaft m.b.H. · AT

Inventors

Martin Mullner · Traun, AT
Gerhard Stern · Linz, AT
Markus Rossler · Linz, AT

Key dates

Filing date	Jul 12, 1990
Grant date	Aug 27, 1991
Priority date	—
Expiry date	Jul 12, 2010

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C273/1818
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Process for the preparation of asymmetrically substituted ureas by reaction of a gaseous mixture of isocyanic acid and ammonia having a temperature of 260.degree. to 600.degree. C. with a primary or secondary amine.

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