Granted Patent
Utility
US 6,139,622 · App. 09/182,522
Process for the production of integrally waterproofed concrete
Inventors:
Thomas Gobel, Wolfgang Lortz, Reiner Störger, Folker Wittmann, Andreas Gerdes
Patented Case
View Patent ↗
Granted: Oct 31, 2000
Filed: Oct 30, 1998
Inventors
Thomas Gobel
Wolfgang Lortz
Reiner Störger
Folker Wittmann
Andreas Gerdes
Assignee (at issue)
Degussa-Huels 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.