Granted Patent
Utility
US 6,802,997 · App. 10/291,273
Method of manufacturing rigid polyurethane foam material, method of manufacturing refrigerator, and refrigerator
Inventors:
Kazutaka Uekado, Akiko Yuasa
Patented Case
View Patent ↗
Granted: Oct 12, 2004
Filed: Nov 8, 2002
Inventors
Kazutaka Uekado
Akiko Yuasa
Assignee (at issue)
Matsushita Refrigeration 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.