Patent Assignment
Reel/Frame 006468/0796
Assignment of Assignors Interest.
Recorded: 1993-02-24
Pages: 4
Assignee
ZENECA LTD.
IMPERIAL CHEMICAL HOUSE, MILLBANK, LONDON, ENGLAND, SW1P 3JF, UNITED KINGDOM
Covered Property
(1)
Chemical Process of Separating Metals from an Organic Complex
Patent:
5,332,420 →
Application:
08/021,901 →
Related Assignments
(3)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignor's Interest
Sep 28, 2001
From: SYNGENTA LIMITED
To: AVECIA LIMITED
Reel/Frame 012302/0096 →
Correct Assignee Address at 012302/0096
Sep 29, 2005
From: SYNGENTA LIMITED
To: AVECIA LIMITED
Reel/Frame 016835/0967 →
Assignment of Assignor's Interest
Apr 23, 2008
From: AVECIA LIMITED
To: ASARCO LLC
Reel/Frame 020837/0491 →