Granted Patent
Utility
US 5,386,028 · App. 08/016,452
Process for the production of N-.beta.-hydroxyalkyl-tri-N-carboxyalkyl-1,4,7,10-tetraazacyclododecane and N-.beta.-hydroxyalkyl-tri-N-carboxyalkyl-1,4,8,11-tetraazacyclotetradeca ne derivatives and their metal complexes
Inventors:
Ulf Tilstam, Helmut Borner, Klaus Nickisch, Heinz Gries, Johannes Platzek
Patented Case
View Patent ↗
Granted: Jan 31, 1995
Filed: Feb 11, 1993
Inventors
Ulf Tilstam
Helmut Borner
Klaus Nickisch
Heinz Gries
Johannes Platzek
Assignee (at issue)
SCHERING CORPORATION
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.