Granted Patent
Utility
US 6,013,706 · App. 08/293,577
Process for the preparation of hyrolysis-stable trivalent phosphorus compounds and their use as stabilizers for thermoplastics
Inventors:
Hans-Jerg Kleiner, Dieter Regnat, Gerhard Pfahler
Patented Case
View Patent ↗
Granted: Jan 11, 2000
Filed: Aug 22, 1994
Inventors
Hans-Jerg Kleiner
Dieter Regnat
Gerhard Pfahler
Assignee (at issue)
Clariant 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.