Patent Assignment
Reel/Frame 003856/0371
Assignment of Assignors Interest.
Recorded: 1981-01-07
Pages: 1
Assignor
DERRENBACKER EDWARD L.
Executed: 1980-12-29
Assignee
MALLINCKRODT, INC.
A CORP. MO, ST. LOUIS, MISSOURI
Covered Property
(1)
Process for the Selective Preparation of P-Aminophenol from Nitrobenzene
Patent:
4,307,249 →
Application:
06/223,195 →
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 →