Granted Patent
Utility
US 4,312,813 · App. 06/163,121
Bisquaternary ammonium compound
Inventors:
Martin K. Lindemann, Elvin R. Lukenbach
Patented Case
View Patent ↗
Granted: Jan 26, 1982
Filed: Jun 26, 1980
Inventors
Martin K. Lindemann
Elvin R. Lukenbach
Assignee (at issue)
Johnson & Johnson Baby Products Company
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.