IP Library › Assignment 004543/0890
Patent Assignment
Reel/Frame 004543/0890

Assignment of Assignors Interest.

Recorded: 1986-04-25 Pages: 3
Assignors
ASHFORD, JAMES D.
Executed: 1986-04-13
EASTLACK, JAMES K.
Executed: 1986-03-27
HERRING, GARY D.
Executed: 1986-03-27
WILSON, WILLIAM N.
Executed: 1986-03-27
Assignee
Covered Property (1)
Well Treatment Method Using Sodium Silicate to Seal Formation
Patent: 4,662,448 →
Application: 06/855,660 →
Related Assignments (1)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignor's Interest Dec 17, 2001
From: ATLANTIC RICHFIELD COMPANY
To: PHILLIPS PETROLEUM COMPANY
Reel/Frame 012333/0329 →