Granted Patent
Utility
US 6,074,698 · App. 09/142,531
Process for producing surface-modified rubber, surface-modified rubber, and sealing material
Inventors:
Shinya Sakurai, Yukio Kobayashi
Patented Case
View Patent ↗
Granted: Jun 13, 2000
Filed: Sep 9, 1998
Inventors
Shinya Sakurai
Yukio Kobayashi
Assignee (at issue)
NIPPON VALQUA INDUSTRIES, LTD.
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.