IP Library › Assignment 008421/0259
Patent Assignment
Reel/Frame 008421/0259

Assignment of Assignor's Interest

Recorded: 1997-03-06 Pages: 3
Assignors
DAMMEL, RALPH R.
Executed: 1997-03-03
NORWOOD, ROBERT A.
Executed: 1997-02-27
Assignee
HOECHST CELANESE CORPORATION
ROUTE 202-206 NORTH, SOMERVILLE, NEW JERSEY, 08876
Covered Property (1)
Bottom Antireflective Coatings Through Refractive Index Modification by Anomalous Dispersion
Patent: 6,042,992 →
Application: 08/811,806 →
Related Assignments (3)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignor's Interest Nov 6, 1997
From: HOECHST CELANESE CORPORATION
To: CLARIANT FINANCE (BVI) LIMITED
Reel/Frame 008829/0760 →
Assignment of Assignor's Interest May 4, 2005
From: CLARIANT FINANCE (BVI) LIMITED
To: AZ ELECTRONIC MATERIALS USA CORP.
Reel/Frame 015972/0092 →
Assignment of Assignor's Interest Jan 8, 2015
From: AZ ELECTRONIC MATERIALS USA CORP.
To: MERCK PATENT GMBH
Reel/Frame 034742/0206 →