IP Library › Granted Patent US 5,789,628
Granted Patent Utility
US 5,789,628 · App. 08/710,756

Production of 2,2'-bis (4-hydroxyphenyl) propanes in the presence of organopolysiloxanes containing sulphonate and mercapto groups

Inventors: Emmanuel Auer, Stefan Wieland, Hans Lansink-Rotgerink, Hauke Jacobsen, Heike Riedemann
Patented Case View Patent ↗
Granted: Aug 4, 1998 Filed: Sep 20, 1996
Inventors
Emmanuel Auer
Stefan Wieland
Hans Lansink-Rotgerink
Hauke Jacobsen
Heike Riedemann
Assignee (at issue)
Degussa AG

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.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 5,789,628
App. No.
08/710,756
Filed
1996-09-20
Granted
1998-08-04
Kind
A