Granted Patent
Utility
US 5,512,653 · App. 08/488,091
Lactic acid containing hydroxycarboxylic acid for the preparation of polhydroxycarboxylic acid
Inventors:
Masahiro Ohta, Shoji Obuchi, Yasunori Yoshida
Patented Case
View Patent ↗
Granted: Apr 30, 1996
Filed: Jun 7, 1995
Inventors
Masahiro Ohta
Shoji Obuchi
Yasunori Yoshida
Assignee (at issue)
Mitsui Toatsu Chemicals, Incorporated
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.