Granted Patent
Utility
US 6,322,347 · App. 09/285,948
Methods for manufacturing foam material including systems with pressure restriction element
Inventor:
Jingyi Xu
Patented Case
View Patent ↗
Granted: Nov 27, 2001
Filed: Apr 2, 1999
Inventor
Jingyi Xu
Assignee (at issue)
Trexel, 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.