Granted Patent
Utility
US 6,099,780 · App. 09/204,246
Method of three layer injection molding with sequential and simultaneous coinjection
Inventor:
Jobst U. Gellert
Patented Case
View Patent ↗
Granted: Aug 8, 2000
Filed: Dec 3, 1998
Inventor
Jobst U. Gellert
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.