Granted Patent
Utility
US 4,595,746 · App. 06/682,717
Promotion of .epsilon.-caprolactam polymerization with lactam magnesium halide catalyst and 2-oxo-1-pyrrolidinyl groups
Inventors:
James D. Gabbert, Ross M. Hedrick
Patented Case
View Patent ↗
Granted: Jun 17, 1986
Filed: Dec 17, 1984
Inventors
James D. Gabbert
Ross M. Hedrick
Assignee (at issue)
Monsanto Company
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.