Granted Patent
Utility
US 5,507,304 · App. 08/523,427
Polymer blend composed of cellulose acetate and starch acetate used to form fibers, films and plastic materials and a process to prepare said blend
Inventors:
Joanne C. Maheras, John B. Hopkins, Jr., Heribert Tetzlaff
Patented Case
View Patent ↗
Granted: Apr 16, 1996
Filed: Sep 5, 1995
Inventors
Joanne C. Maheras
John B. Hopkins, Jr.
Heribert Tetzlaff
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.