Granted Patent
Utility
US 5,869,716 · App. 08/704,694
Process for the production of esterquats
Inventors:
Rafael Pi Subirana, Joaquim Bigorra Llosas, Antonio Trius Oliva
Patented Case
View Patent ↗
Granted: Feb 9, 1999
Filed: Sep 16, 1996
Inventors
Rafael Pi Subirana
Joaquim Bigorra Llosas
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.