Patent Assignment
Reel/Frame 003807/0475
Assignment of Assignors Interest.
Recorded: 1980-10-24
Pages: 2
Assignors
BERGSTROM ARTHUR E.
Executed: 1980-07-21
NELSON RICHARD H.
Executed: 1980-07-21
MALY GEORGE P.
Executed: 1980-09-30
Assignee
CARBIDE BLAST JOINTS, INC. A CORP. OF TX.
HOUSTON, TEXAS
Covered Property
(1)
Blast Joint for Subterranean Wells
Patent:
4,349,050 →
Application:
06/190,089 →
Related Assignments
(4)
Other recorded transfers of the patent in this record — the chain of ownership.
Change of Name Effective: May 2, 1988
Sep 23, 1988
From: CARBIDE BLAST JOINTS, INC.
To: VERMONT AMERICAN OF TEXAS, INC.
Reel/Frame 004996/0093 →
Assignment of Assignors Interest.
Sep 23, 1988
From: CARBIDE BLAST JOINTS, INC.
To: VERMONT AMERICAN OF TEXAS, INC.
Reel/Frame 004996/0100 →
Assignment of Assignors Interest.
Feb 24, 1989
From: CARBIDE BLAST JOINTS, INC.
To: VERMONT AMERICAN CORPORATION
Reel/Frame 005021/0649 →
Assignment of Assignors Interest.
Mar 23, 1989
From: CARBIDE BLAST JOINTS, INC.
To: VERMONT AMERICAN OF TEXAS
Reel/Frame 005094/0612 →