Granted Patent
Utility
US 4,350,829 · App. 06/052,590
Process for preparing isobutyric acid
Inventors:
Tatsuo Masuko, Shigeo Fukaya, Nobuyuki Murai, Jun Noma
Patented Case
View Patent ↗
Granted: Sep 21, 1982
Filed: Jun 27, 1979
Inventors
Tatsuo Masuko
Shigeo Fukaya
Nobuyuki Murai
Jun Noma
Assignee (at issue)
Mitsubishi Chemical 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.