Patent Assignment
Reel/Frame 023416/0218
Assignment of Assignor's Interest
Recorded: 2009-10-23
Pages: 3
Assignors
ENGELHARDT, FRIEDRICH
Executed: 2009-09-07
SPIELMANN, WERNER
Executed: 2009-09-04
BREMAR, CHRISIAN
Executed: 2009-09-09
OBERMULLER, AMJA
Executed: 2009-09-04
CHRISTIAN, JOACHIM
Executed: 2009-09-04
Assignee
ALLESSA CHEMIE GMBH
ALT FECHENHEIM 34, FRANKFURT, 60386, GERMANY
Covered Property
(1)
Stabilized Aqueous Polymer Compositions and Their Use
Related Assignments
(3)
Other recorded transfers of the patent in this record — the chain of ownership.
Change of Name
Apr 4, 2013
From: ALLESSACHEMIE GMBH
To: ALLESSA GMBH
Reel/Frame 030149/0490 →
Assignment of Assignor's Interest
Aug 6, 2013
From: ALLESSA GMBH
To: TOUGAS OILFIELD SOLUTIONS GMBH
Reel/Frame 031040/0184 →
Assignment of Assignor's Interest
Dec 14, 2025
From: TOUGAS OILFIELD SOLUTIONS GMBH
To: TOUGAS HOLDING GMBH
Reel/Frame 073210/0029 →