Granted Patent
Utility
US 4,904,795 · App. 07/173,487
Halogen substituted phthalimide flame retardants
Inventors:
Joseph M. Bohen, Gerald H. Reifenberg, Daryl L. Stein
Patented Case
View Patent ↗
Granted: Feb 27, 1990
Filed: Mar 25, 1988
Inventors
Joseph M. Bohen
Gerald H. Reifenberg
Daryl L. Stein
Assignee (at issue)
Pennwalt 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.