Granted Patent
Utility
US 5,422,381 · App. 08/275,234
Foamed cellular polyester resins and process for their preparation
Inventors:
Hussain Al Ghatta, Tonino Severini, Luca Astarita
Patented Case
View Patent ↗
Granted: Jun 6, 1995
Filed: Jul 14, 1994
Inventors
Hussain Al Ghatta
Tonino Severini
Luca Astarita
Assignee (at issue)
M. & G. Richerche S.p.A.
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.