Patent Assignment
Reel/Frame 004040/0202
Assignment of Assignors Interest.
Recorded: 1982-09-07
Pages: 3
Assignor
ERCO ENVIROTECH LTD.
Executed: 1981-10-30
Assignee
ERCO INDUSTRIES LIMITED
2 GIBS ROAD, ISLINGTON, ONTARIO, CANADA
Covered Properties
(2)
Digestion and Bleaching of Wood Pulp Followed by Recovery of Chemicals and Countercurrent Flow of Wash Water
Patent:
3,698,995 →
Application:
05/117,664 →
Removal of Potassium Values from Pulp Mill Liquors
Patent:
4,249,990 →
Application:
06/026,204 →
Related Assignments
(5)
Other recorded transfers of the patents in this record — the chain of ownership.
Merger 12-30-84
Mar 4, 1985
From: ERCO INDUSTRIES LIMITED
To: TENNECO CANADA INC.
Reel/Frame 004368/0762 →
Assignment of Assignors Interest.
Aug 25, 1992
From: TENNECO CANADA INC., A CORP. OF ONTARIO
To: STERLING CANADA, INC., A CORP. OF DE
Reel/Frame 006251/0006 →
Security Interest
Aug 25, 1992
From: STERLING CANADA, INC. A DE CORP.
To: BANK OF NOVA SCOTIA, THE
Reel/Frame 006258/0484 →
Release of Security Interest
May 8, 1995
From: BANK OF NOVA SCOTIA, THE
To: STERLING CHEMICALS, INC
Reel/Frame 007467/0397 →
Security Agreement
Sep 16, 1996
From: STERLING CANADA, INC.
To: TEXAS COMMERCE BANK NATIONAL ASSOCIATION
Reel/Frame 008126/0807 →