Patent Assignment
Reel/Frame 005822/0550
Assignment of Assignors Interest.
Recorded: 1991-09-03
Pages: 2
Assignor
PPG INDUSTRIES, INC.
Executed: 1991-08-16
Assignee
Covered Property
(1)
Method of Providing a Substrate with a Layer Comprising a Polyvinyl Based Hydrogel and a Biochemically Active Material
Patent:
5,134,057 →
Application:
07/419,310 →
Related Assignments
(2)
Other recorded transfers of the patent in this record — the chain of ownership.
Assignment of Assignors Interest.
Oct 10, 1989
From: KUYPERS, MARTINUS H.; STEEGHS, GERARDUS F. J.; BRINKMANN, EGBERT
To: PPG BIOMEDICAL SYSTEMS, INC.
Reel/Frame 005155/0590 →
Merger
May 21, 1990
From: PPG BIOMEDICAL SYSTEMS, INC., A CORP. OF DE.
To: PPG INDUSTRIES, INC., A CORP. OF PA.
Reel/Frame 005368/0234 →