Patent Assignment
Reel/Frame 006975/0512
Assignment of Assignor's Interest
Recorded: 1994-05-16
Pages: 2
Assignee
BETZ LABORATORIES, INC.
4636 SOMERTON ROAD, TREVOSE, PENNSYLVANIA, 19053-6783
Covered Property
(1)
Methods for Melting and Dispersing Paraffin Wax in Oil Field Production Equipment
Patent:
5,484,488 →
Application:
08/223,919 →
Related Assignments
(3)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignor's Interest
Jun 19, 1995
From: BETZ LABORATORIES, INC.
To: BJ SERVICES COMPANY
Reel/Frame 007534/0045 →
Assignment of Assignor's Interest
Oct 2, 1995
From: BJ SERVICES COMPANY
To: BJ SERVICES COMPANY, U.S.A.
Reel/Frame 007674/0082 →
Assignment of Assignor's Interest
Oct 31, 2001
From: BJ SERVICES COMPANY, U.S.A.
To: BJ SERVICES COMPANY
Reel/Frame 012333/0812 →