Granted Patent
Utility
US 5,369,132 · App. 08/193,745
Method for producing a spherical acrylonitrile crosslinked copolymer
Inventors:
Tsuyoshi Ito, Junya Watanabe, Shintaro Sawada
Patented Case
View Patent ↗
Granted: Nov 29, 1994
Filed: Feb 9, 1994
Inventors
Tsuyoshi Ito
Junya Watanabe
Shintaro Sawada
Assignee (at issue)
Mitsubishi Kasei Corporation
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.