Granted Patent
Utility
US 4,293,613 · App. 06/157,129
Acrylic fiber having improved basic dyeability
Inventors:
Hartwig C. Bach, Helmuth E. Hinderer
Patented Case
View Patent ↗
Granted: Oct 6, 1981
Filed: Jun 6, 1980
Inventors
Hartwig C. Bach
Helmuth E. Hinderer
Assignee (at issue)
Monsanto Company
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.