Granted Patent
Utility
US 4,452,940 · App. 06/547,670
Polymer water-in-oil emulsions
Inventor:
Meyer R. Rosen
Patented Case
View Patent ↗
Granted: Jun 5, 1984
Filed: Nov 1, 1983
Inventor
Meyer R. Rosen
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.