IP Library › Granted Patent US 4,582,943
Granted Patent Utility
US 4,582,943 · App. 06/680,683

Stabilization of polyalkylene glycols

Inventors: Ulrich Kristen, Hermann F. Angerer, Franz Regenass
Patented Case View Patent ↗
Granted: Apr 15, 1986 Filed: Dec 12, 1984
Inventors
Ulrich Kristen
Hermann F. Angerer
Franz Regenass
Assignee (at issue)
Ciba-Geigy

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 4,582,943
App. No.
06/680,683
Filed
1984-12-12
Granted
1986-04-15
Kind
A