Patent Assignment
Reel/Frame 004842/0275
Assignment of Assignors Interest.
Recorded: 1988-03-24
Pages: 2
Assignor
KENNECOTT MINING CORPORATION
Executed: 1988-03-18
Assignee
STANDARD OIL COMPANY, THE, A OH CORP.
200 PUBLIC SQUARE, CLEVELAND, OHIO, 44114
Covered Property
(1)
Sintered Spherical Pellets Containing Clay as a Major Component Useful for Gas and Oil Well Proppants
Patent:
4,427,068 →
Application:
06/405,055 →
Related Assignments
(3)
Other recorded transfers of the patent in this record — the chain of ownership.
Change of Name Effective Dec. 31, 1986. (See Document for Details)
Jun 25, 1987
From: KENNECOTT CORPORATION
To: KENNECOTT MINING CORPORATION
Reel/Frame 004815/0036 →
Assignment of Assignors Interest.
Jun 25, 1987
From: KENNECOTT MINING CORPORATION
To: STANDARD OIL COMPANY, 200 PUBLIC SQUARE, CLEVELAND, OHIO 44114 A OHIO CORP.
Reel/Frame 004815/0079 →
Assignment of Assignors Interest.
May 26, 1989
From: STANDARD OIL COOMPANY
To: CARBO CERAMICS INC.
Reel/Frame 005093/0093 →