Granted Patent
Utility
US 5,037,448 · App. 07/374,511
Processes for the mass dyeing of synthetic polyamides
Inventor:
Bansi Lal Kaul
Patented Case
View Patent ↗
Granted: Aug 6, 1991
Filed: Jun 30, 1989
Inventor
Bansi Lal Kaul
Assignee (at issue)
Sandoz AG
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.