Patent Assignment
Reel/Frame 003876/0873
Assignment of Assignors Interest.
Recorded: 1981-04-20
Pages: 2
Assignors
CLINGAN WILLIAM R.
Executed: 1981-04-16
DERRENBACKER EDWARD L.
Executed: 1981-04-15
DUNN THOMAS J.
Executed: 1981-04-14
Assignee
MALLINCKRODT, INC.
A CORP. OF MO., ST.LOUIS, MISSOURI
Covered Property
(1)
Process for the Purification of P-Aminophenol
Patent:
4,440,954 →
Application:
06/251,461 →
Related Assignments
(3)
Other recorded transfers of the patent in this record — the chain of ownership.
Change of Name
Feb 14, 1986
From: MALCO, INC.
To: MALLINCKRODT, INC.
Reel/Frame 004572/0403 →
Assignment of Assignors Interest.
Feb 14, 1986
From: MALLINCKRODT, INC.
To: MALCO, INC., ST. LOUIS, MISSOURI A CORP. OF DE.
Reel/Frame 004572/0411 →
Assignment of Assignors Interest.
Dec 24, 1990
From: MALLINCKRODT, INC., A DE CORP.
To: MALLINCKRODT SPECIALTY CHEMICALS COMPANY, A DE CORP.
Reel/Frame 005602/0024 →