Granted Patent
Utility
US 5,874,517 · App. 08/997,402
Method to reduce regenerated acetaldehyde in pet resin
Inventors:
Xiaoyan Huang, Ligia Dominguez
Patented Case
View Patent ↗
Granted: Feb 23, 1999
Filed: Dec 23, 1997
Inventors
Xiaoyan Huang
Ligia Dominguez
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.