Granted Patent
Utility
US 5,989,296 · App. 09/017,063
Solvent process for recovering indigo dye from textile scrap
Inventors:
Robert T. Patton, David M. Hall
Patented Case
View Patent ↗
Granted: Nov 23, 1999
Filed: Feb 2, 1998
Inventors
Robert T. Patton
David M. Hall
Assignee (at issue)
American Renewable Resources LLC
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.