Granted Patent
Utility
US 4,468,489 · App. 06/384,500
Stabilization of polycondensation catalysts
Inventors:
Kurt Weinberg, Gordon C. Johnson
Patented Case
View Patent ↗
Granted: Aug 28, 1984
Filed: Jun 3, 1982
Inventors
Kurt Weinberg
Gordon C. Johnson
Assignee (at issue)
Union Carbide 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.