IP Library › Assignment 027402/0926
Patent Assignment
Reel/Frame 027402/0926

Assignment of Assignor's Interest

Recorded: 2011-12-16 Pages: 4
Assignor
GROTTENTHALER, DAVID A.
Executed: 2011-11-18
Assignee
KROFF CHEMICAL COMPANY
12 FEDERAL STREET, ONE NORTH SHORE CENTER, SUITE 450, PITTSBURGH, PENNSYLVANIA, 15212
Covered Property (1)
Methods of Treating Flowback Water
Patent: 8,871,691 →
Application: 12/794,550 →
Publication: US 2010/0307753
Related Assignments (3)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignor's Interest Sep 8, 2010
From: THE NATIONAL COLLOID COMPANY
To: KROFF CHEMICAL COMPANY
Reel/Frame 024950/0414 →
Assignment of Assignor's Interest Nov 5, 2010
From: REY, SUSAN
To: THE NATIONAL COLLOID COMPANY
Reel/Frame 025325/0516 →
Assignment of Assignor's Interest Nov 19, 2010
From: REY, PAUL
To: KROFF CHEMICAL COMPANY
Reel/Frame 025408/0692 →