Patent Assignment
Reel/Frame 005612/0051
Assignment of Assignors Interest.
Recorded: 1991-01-18
Pages: 7
Assignor
POTTER, JOHN K.
Executed: 1987-08-10
Covered Property
(1)
Maufacture of Silica Gels Using Shear to Reduce the Particle Size Prior to Washing with a Hydrocyclone
Patent:
5,215,733 →
Application:
07/642,568 →
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 →