Patent Assignment
Reel/Frame 003794/0063
Assignment of Assignors Interest.
Recorded: 1980-08-29
Pages: 2
Assignor
HALL EDWARD N.
Executed: 1980-08-04
Assignee
CHROMALLOY AMERICAN CORPORATION, A CORP. OF DE
120 SOUTH CENTRAL,, ST. LOUIS,, MISSOURI, 63105
Covered Property
(1)
Wax Control in Oil Wells Using a Thermal Syphon System
Patent:
4,328,865 →
Application:
06/177,398 →
Related Assignments
(4)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignors Interest.
Sep 18, 1991
From: CHROMALLOY AMERICAN CORPORATION, A DE CORP.
To: SEQUA ENGINEERED SERVICES, INC., A WEST VIRGINIA CORP.
Reel/Frame 005853/0137 →
Assignment of Assignor's Interest
Aug 30, 1993
From: SEQUA ENGINEERED SERVICES, INC.
To: WEATHERFORD-PETCO, INC.
Reel/Frame 006674/0275 →
Security Interest
Sep 7, 1993
From: WEATHERFORD U.S., INC.
To: TEXAS COMMERCE BANK NATIONAL ASSOICATION
Reel/Frame 006677/0420 →
Release from Security Agreement
Apr 26, 1994
From: TEXAS COMMERCE BANK NATIONAL ASSOCIATION
To: WEATHERFORD U.S., INC.
Reel/Frame 006968/0187 →