Granted Patent
Utility
US 5,494,746 · App. 08/227,580
Acrylic fiber and process for producing the same
Inventors:
Mitsuaki Shiraga, Hiroyshi Okada, Shigeru Sawayama, Yukino Yamada
Patented Case
View Patent ↗
Granted: Feb 27, 1996
Filed: Apr 14, 1994
Inventors
Mitsuaki Shiraga
Hiroyshi Okada
Shigeru Sawayama
Yukino Yamada
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.