Granted Patent
Utility
US 6,028,229 · App. 08/860,891
Process for producing end-group-locked non-ionic tensides
Inventors:
Joaquim Bigorra Llosas, Nuria Bonastre, Rafael Pi Subirana, Antonio Trius Oliva
Patented Case
View Patent ↗
Granted: Feb 22, 2000
Filed: Aug 11, 1997
Inventors
Joaquim Bigorra Llosas
Nuria Bonastre
Rafael Pi Subirana
Antonio Trius Oliva
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.