Patent Assignment
Reel/Frame 004980/0291
Assignment of Assignors Interest.
Recorded: 1988-12-09
Pages: 1
Assignors
STAAL, LEENDERT H.
Executed: 1987-11-10
VIS, JAN C.
Executed: 1987-11-05
GROENEWEG, JAN W.
Executed: 1987-11-05
Assignee
UNILEVER PATENT HOLDINGS B.V., A COMPANY OF THE NETHERLANDS
ROCHUSSENSTRAAT 78, ROTTERDAM, NETHERLANDS
Covered Property
(1)
Metal-Oxide-Silica Adsorbent for Bleaching and Refining Oil
Patent:
4,812,436 →
Application:
07/124,864 →
Related Assignments
(3)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignor's Interest
Oct 9, 1998
From: UNILEVER PATENT HOLDINGS B.V.
To: CROSFIELD LIMITED
Reel/Frame 009525/0922 →
Change of Name
Nov 27, 2007
From: CROSFIELD LIMITED
To: INEOS SILICAS LIMITED
Reel/Frame 020186/0803 →
Assignment of U.S. Patents
Jul 28, 2008
From: INEOS SILICAS LIMITED
To: PQ SILICAS UK LIMITED
Reel/Frame 021301/0001 →