Granted Patent
Utility
US 6,503,972 · App. 09/700,437
White elastomer seal materials and a process for manufacture thereof
Inventors:
Bunichi Rai, Shinichi Sogo
Patented Case
View Patent ↗
Granted: Jan 7, 2003
Filed: Jun 7, 2001
Inventors
Bunichi Rai
Shinichi Sogo
Assignee (at issue)
DUPONT DOW ELASTOMERS, LLC
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.