Granted Patent
Utility
US 5,612,475 · App. 08/564,260
Carboxymethylated guar galactomannan as a sizing agent
Inventors:
Hans P. Miemietz, Kaspar Schlueter, Siegrid Waltenberger-Scharffetter, Bernhard Wuestnienhaus
Patented Case
View Patent ↗
Granted: Mar 18, 1997
Filed: Dec 20, 1995
Inventors
Hans P. Miemietz
Kaspar Schlueter
Siegrid Waltenberger-Scharffetter
Bernhard Wuestnienhaus
Assignee (at issue)
Henkel Kommanditgesellschaft auf Aktien
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.