Patent Assignment
Reel/Frame 004331/0722
Assignment of Assignors Interest.
Recorded: 1984-11-29
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 CORP. OF DE
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:
4,502,965 →
Application:
06/530,796 →
Related Assignments
(1)
Other recorded transfers of the patent in this record — the chain of ownership.