Granted Patent
Utility
US 6,613,810 · App. 09/600,986
Expandable microspheres and process for producing the same
Inventors:
Tetsuo Ejiri, Genzo Asai, Yoshikatsu Satake
Patented Case
View Patent ↗
Granted: Sep 2, 2003
Filed: Jul 25, 2000
Inventors
Tetsuo Ejiri
Genzo Asai
Yoshikatsu Satake
Assignee (at issue)
Kureha Kagaku K.K.
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.