Granted Patent
Utility
US 4,968,834 · App. 07/521,294
Recovery of acrylic acid and/or ethyl acrylate from black acid
Inventors:
Brad Smith, Adolfo Aguilo, Cecil D. Homer, Jr.
Patented Case
View Patent ↗
Granted: Nov 6, 1990
Filed: May 7, 1990
Inventors
Brad Smith
Adolfo Aguilo
Cecil D. Homer, Jr.
Assignee (at issue)
Hoechst Celanese Corporation
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.