Patent Assignment
Reel/Frame 007967/0407
Assignment of Assignor's Interest
Recorded: 1996-05-31
Pages: 4
Assignors
HART, WM. MARK
Executed: 1996-03-19
PENG, SYD S.
Executed: 1996-03-29
CHEN, JINSHENG S.
Executed: 1996-03-22
Assignee
CYPRUS AMAX COAL COMPANY
9100 E. MINERAL CIRCLE, ENGLEWOOD, COLORADO, 80112
Covered Property
(1)
Method and Aparatus for Determining Compressive Stress in Pillars
Patent:
5,668,325 →
Application:
08/622,816 →
Related Assignments
(3)
Other recorded transfers of the patent in this record — the chain of ownership.
Merger
Aug 30, 1999
From: CYPRUS AMAX COAL COMPANY
To: RAG AMERICAN COAL COMPANY
Reel/Frame 010206/0825 →
Assignment of Assignor's Interest
Aug 6, 2004
From: FOUNDATION AMERICAN COAL COMPANY, LLC; FOUNDATION COAL DEVELOPMENT CORPORATON; FOUNDATION COAL WEST, INC.
To: CITICORP NORTH AMERICA, INC.
Reel/Frame 015642/0450 →
Release of Security Interest
Aug 23, 2019
From: CITICORP NORTH AMERICA, INC.
To: ALPHA AMERICAN COAL COMPANY, LLC (F/K/A FOUNDATION AMERICA COAL COMPANY, LLC, WHICH WAS F/K/A RAG AMERICAN COAL COMPANY, LLC); DFDSTE, LLC (AS SUCCESSOR BY CONVERSION TO DFDSTE CORP., WHICH WAS F/K/A DRY SYSTEMS TECHNOLOGIES, INC., WHICH WAS F/K/A FOUNDATION COAL DEVELOPMENT CORPORATION, WHICH WAS F/K/A RAG COAL DEVELOPMENT CORPORATION); ALPHA COAL WEST, LLC (SUCCESSOR BY CONVERSION TO ALPHA COAL WEST, INC., WHICH WAS F/K/A FOUNDATION COAL WEST, INC., WHICH WAS F/K/A RAG COAL WEST, INC.
Reel/Frame 050147/0137 →