IP Library › Assignment 004472/0891
Patent Assignment
Reel/Frame 004472/0891

Assignment of Assignors Interest.

Recorded: 1985-09-23 Pages: 2
Assignor
TROUW, NORMAN S.
Executed: 1985-09-16
Assignee
Covered Property (1)
Method for the Preparation of Polybenzimidazole Membranes
Patent: 4,693,825 →
Application: 06/779,017 →
Related Assignments (1)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignor's Interest Nov 24, 1998
From: HOECHST CELANESE CORPORATION
To: HOECHST AKTIENGESELLSCHAFT
Reel/Frame 009534/0147 →