Granted Patent
Utility
US 5,994,536 · App. 09/088,700
Process for mono- and 1,7-bis-N-.beta.-hydroxyalkylation of cyclene; N-.beta.-hydroxyalkyl-1,4,7,10-tetraazacyclododecane-lithium-salt complexes and the use of the complexes for the production of gadobutrol and analogs
Inventors:
Orlin Petrov, Peter Blaszkiewicz
Patented Case
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Granted: Nov 30, 1999
Filed: Jun 2, 1998
Inventors
Orlin Petrov
Peter Blaszkiewicz
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.