Patent Assignment
Reel/Frame 031807/0294
Assignment of Assignor's Interest
Recorded: 2013-12-18
Pages: 4
Assignors
ZIELINSKI, DAVID P.
Executed: 2013-12-16
EKIN, ABDULLAH
Executed: 2013-12-12
JEFFRIES, MICHAEL K.
Executed: 2013-12-12
Assignee
BAYER MATERIALSICENCE LLC
100 BAYER ROAD, PITTSBURGH, PENNSYLVANIA, 15205-9741
Covered Property
(1)
Methods for Treating a Well Bore Within an Underground Formation
Related Assignments
(8)
Other recorded transfers of the patent in this record — the chain of ownership.
Change of Name
Oct 16, 2015
From: BAYER MATERIALSCIENCE LLC
To: COVESTRO LLC
Reel/Frame 036876/0001 →
Assignment of Assignor's Interest
Mar 11, 2016
From: ROJAS, MARIO ROBERTO
To: ECOLAB USA INC.
Reel/Frame 037959/0046 →
Security Interest
Jun 5, 2020
From: CHAMPIONX USA INC.
To: BANK OF AMERICA, N.A.
Reel/Frame 052848/0368 →
Security Interest
Jun 5, 2020
From: CHAMPIONX USA INC.
To: JPMORGAN CHASE BANK, N.A.
Reel/Frame 053250/0001 →
Change of Address
Mar 31, 2022
From: ECOLAB USA INC.
To: ECOLAB USA INC.
Reel/Frame 059568/0491 →
Assignment of Assignor's Interest
Apr 1, 2022
From: COVESTRO LLC
To: CHAMPIONX USA INC.
Reel/Frame 059477/0832 →
Release of Security Interest
Jun 7, 2022
From: BANK OF AMERICA, N.A.
To: CHAMPIONX USA INC.
Reel/Frame 060304/0267 →
Release of Security Interest in Patents
Jul 17, 2025
From: JPMORGAN CHASE BANK, N.A.
To: CHAMPIONX LLC; APERGY ESP SYSTEMS, LLC; APERGY BMCS ACQUISITION CORP; HARBISON-FISCHER, INC.
Reel/Frame 072004/0019 →