IP Library › Assignment 004334/0432
Patent Assignment
Reel/Frame 004334/0432

Assignment of Assignors Interest.

Recorded: 1984-12-04 Pages: 1
Assignors
GIDDINGS, DAVID M.
Executed: 1983-09-09
RIES, DONALD G.
Executed: 1983-09-09
SYRINEK, ALLEN R.
Executed: 1983-09-09
Assignee
NALCO CHEMICAL COMPANY
A DE CORP., OAK BROOK, ILLINOIS
Covered Property (1)
Terpolymers for Use as High Temperature Fluid Loss Additive and Rheology Stabilizer for High Pressure, High Temperature Oil Well Drilling Fluids
Patent: 4,502,966 →
Application: 06/530,814 →
Related Assignments (2)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignor's Interest Mar 7, 1996
From: NALCO CHEMICAL COMPANY
To: NALCO/ EXXON ENERGY CHEMICALS, L.P.
Reel/Frame 007846/0309 →
Change of Name Dec 7, 2001
From: NALCO/EXXON ENERGY CHEMICALS, L.P.
To: ONDEO NALCO ENERGY SERVICES, L.P.
Reel/Frame 012312/0854 →