Patent Assignment
Reel/Frame 005150/0797
Merger February 27, 1987
Recorded: 1989-06-14
Pages: 6
Assignor
AMERICAN HOECHST CORPORATION
Executed: 1987-02-27
Assignee
Covered Property
(1)
High Temperature Post Exposure Baking Treatment for Positive Photoresist Compositions
Patent:
4,885,232 →
Application:
06/921,879 →
Related Assignments
(3)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignors Interest.
Jun 14, 1989
From: SPAK, MARK A.
To: AMERICAN HOECHST CORPORATION
Reel/Frame 005150/0805 →
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 →