Granted Patent
Utility
US 5,380,933 · App. 08/187,719
Method for producing an unsaturated carboxylic acid
Inventors:
Takashi Ushikubo, Hiroya Nakamura, Yukio Koyasu, Shin Wajiki
Patented Case
View Patent ↗
Granted: Jan 10, 1995
Filed: Jan 28, 1994
Inventors
Takashi Ushikubo
Hiroya Nakamura
Yukio Koyasu
Shin Wajiki
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.