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HALLIBURTON CO. v. SCHLUMBERGER TECHNOLOGY CORP.

No. 90-1191.

925 F.2d 1435 (1991)

HALLIBURTON COMPANY, Plaintiff-Appellant, v. SCHLUMBERGER TECHNOLOGY CORPORATION, Defendant-Appellee.

United States Court of Appeals, Federal Circuit.

Rehearing Denied March 15, 1991.

Attorney(s) appearing for the Case

Donald R. Dunner, Finnegan, Henderson, Farabow, Garrett & Dunner, Washington, D.C., argued for plaintiff-appellant. With him on the brief were Allen M. Sokal and Richard L. Stroup.

Ronald L. Palmer, Baker & Botts, Dallas, Tex., argued for defendant-appellee. With him on the brief were Mitchell D. Lukin, Sylvia M. Egner, Baker & Botts, Houston, Tex. and Dana M. Raymond and Richard G. Berkley, Brumbaugh, Graves, Donohue & Raymond, New York City, of counsel.

Before NEWMAN, and RADER, Circuit Judges, and SKELTON, Senior Circuit Judge.

RADER, Circuit Judge.

Halliburton Company (Halliburton) sued Schlumberger Technology Corporation (Schlumberger) for infringement of U.S. Patent Nos. 4,388,529 ('529 patent), 4,409,481 ('481 patent), and 4,424,444 ('444 patent). These patents embrace tools and techniques for neutron logging of oil wells. Specifically, the patents disclose use of high energy neutrons to measure the properties of underground geological formations.

The United States District Court...

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