Granted Patent
Utility
US 4,935,359 · App. 07/146,276
Fermentation process
Inventors:
Guanglin Yin, Zengxin Tao, Zizheng Yan, Wenzhu Ning, Changhui Wang, Shuiding Wang
Patented Case
View Patent ↗
Granted: Jun 19, 1990
Filed: Feb 3, 1988
Inventors
Guanglin Yin
Zengxin Tao
Zizheng Yan
Wenzhu Ning
Changhui Wang
Shuiding Wang
Assignee (at issue)
Institute of Microbiology
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.