IP Library › Assignment 003852/0731
Patent Assignment
Reel/Frame 003852/0731

Assignment of Assignors Interest.

Recorded: 1981-01-05 Pages: 2
Assignors
GUIDRY SHELBY L.
Executed: 1980-12-16
JERNIGAN KERRY D.
Executed: 1980-12-16
Assignee
SCHLUMBERGER TECHNOLOGY CORPORATION, A CORP. OF TEX.
277 PARK AVENUE, NEW YORK, NEW YORK, 10172
Covered Property (1)
Safety Valve System with Retrievable Equalizing Feature
Patent: 4,454,913 →
Application: 06/222,537 →
Related Assignments (2)
Other recorded transfers of the patent in this record — the chain of ownership.
Merger Nov 18, 1993
From: ARROW OIL TOOLS, INC.
To: LINDSEY COMPLETION SYSTEMS, INC.
Reel/Frame 006777/0360 →
Change of Name Dec 3, 1993
From: LINDSEY COMPLETION SYSTEMS, INC.
To: MASX ENERGY SERVICES GROUP, INC.
Reel/Frame 006783/0444 →