Granted Patent
Utility
US 4,654,911 · App. 06/722,159
Process for degrading by hydrolysis textiles comprising polyester fiber or acetate fiber
Inventors:
Keisuke Konishi, Isao Tanaka
Patented Case
View Patent ↗
Granted: Apr 7, 1987
Filed: Apr 11, 1985
Inventors
Keisuke Konishi
Isao Tanaka
Assignees (at issue)
Wako Technical Research Co., Ltd.
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.