Granted Patent
Utility
US 5,145,484 · App. 07/677,723
Polyvinyl alcohol envelopes of low air content as packing material for fibre-reactive dyes
Inventors:
Roger Lacroix, Ulrich Strahm
Patented Case
View Patent ↗
Granted: Sep 8, 1992
Filed: Mar 29, 1991
Inventors
Roger Lacroix
Ulrich Strahm
Assignee (at issue)
Ciba-Geigy
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.