Granted Patent
Utility
US 5,217,640 · App. 07/774,952
Method of activating .alpha.-butyrolactone (BLO) with ethyl 3-ethoxypropionate (EEP) to provide improved varnish and paint remover solvents
Inventors:
Kolazi S. Narayanan, Frank Fusiak
Patented Case
View Patent ↗
Granted: Jun 8, 1993
Filed: Oct 11, 1991
Inventors
Kolazi S. Narayanan
Frank Fusiak
Assignee (at issue)
Verona Inc.
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.