Granted Patent
Utility
US 5,093,537 · App. 07/735,391
Method for the manufacture of 1,3-propanediol
Inventors:
Jerry D. Unruh, Debra A. Ryan, Ioan Nicolau
Patented Case
View Patent ↗
Granted: Mar 3, 1992
Filed: Jul 24, 1991
Inventors
Jerry D. Unruh
Debra A. Ryan
Ioan Nicolau
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.