Granted Patent
Utility
US 5,199,652 · App. 07/843,710
Method for separating a mixture of two plastics with similar specific gravities
Inventors:
Bela K. Mikofalvy, H. Khim Boo
Patented Case
View Patent ↗
Granted: Apr 6, 1993
Filed: Feb 28, 1992
Inventors
Bela K. Mikofalvy
H. Khim Boo
Assignee (at issue)
B. F. Goodrich 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.