Patent Assignment
Reel/Frame 035658/0389
Assignment of Assignor's Interest
Recorded: 2015-05-18
Pages: 7
Assignors
ZIPPEL, BURKHARD
Executed: 2015-05-18
HELMS, MARTIN
Executed: 2015-05-11
CHANDLER, MARK
Executed: 2015-05-08
HARRALL, SIMON J.
Executed: 2015-05-12
Assignee
WEATHERFORD/LAMB, INC.
2000 ST. JAMES PLACE, HOUSTON, TEXAS, 77056
Covered Property
(1)
Plug Detector for Wellbore Tubular Cementation
Application:
62/001,462 →
Related Assignments
(2)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignor's Interest
Jun 10, 2014
From: ZIPPEL, BURKHARD; HELMS, MARTIN; CHANDLER, MARK; HARRALL, SIMON J.
To: WEATHERFORD/LAMB, INC.
Reel/Frame 033063/0525 →
Nunc Pro Tunc Assignment
Sep 29, 2015
From: WEATHERFORD/LAMB, INC.
To: WEATHERFORD TECHNOLOGY HOLDINGS, LLC
Reel/Frame 036709/0793 →