Syntroleum Vigorously Defends Bio-Synfining (R) Technology Against Neste Allegations

Syntroleum Vigorously Defends Bio-Synfining (R) Technology Against Neste
Allegations

TULSA, Okla., Dec. 21, 2012 (GLOBE NEWSWIRE) -- On December 20, 2012,
Syntroleum Corporation (Nasdaq:SYNM) was sued for alleged patent infringement
in the District of Delaware by Neste Oil Oyj regarding U.S. Patent No.
8,212,094. The '094 patent covers similar subject matter and shares a common
inventor with prior Neste patents (U.S. Patent Nos. 7,279,018 and 8,187,344),
as they are directed to processes for making, or compositions of, diesel fuel
or diesel range hydrocarbons. Syntroleum has not infringed any of Neste's
alleged patent rights and Syntroleum will continue to vigorously defend
against Neste's allegations. The '094 patent, like the '018 and '344 patents,
adds nothing new to the field of diesel fuels or methods for making same. All
claims of Neste's prior '018 patent were invalidated following a March 22,
2012 decision by the USPTO Board of Patent Appeals and Interferences finding
that "the evidence of record as a whole supports the Examiner's conclusion
that the fuel composition as claimed would have been obvious to one of
ordinary skill in the art..." Neste declined to appeal this ruling and on July
31, 2012, the USPTO issued a Reexamination Certificate canceling all claims of
the '018 patent. Likewise, the related '344 patent is the subject of an inter
partes reexamination wherein the USPTO issued a September 14, 2012 Office
Action rejecting all claims of that patent as obvious in view of the prior
art. This reexamination is pending and is assigned Reexam Control Number
95002084.

Syntroleum is currently defending Neste's suit filed May 29, 2012 on the '344
patent in the District of Delaware. Syntroleum's Answer and Counterclaims to
Neste's First Amended Complaint regarding the '344 patent was filed on
September 24, 2012, and Syntroleum's Motion to Stay the district court action
in view of the USPTO reexamination proceedings is pending. Syntroleum will
pursue its non-infringement, invalidity and other defenses with respect to
both asserted Neste patents and is confident that its position will be
vindicated.

About Syntroleum (Nasdaq:SYNM)

Syntroleum Corporation owns the Syntroleum® Process for Fischer-Tropsch (FT)
conversion of synthesis gas into liquid hydrocarbons, the Synfining® Process
for upgrading FT liquid hydrocarbons into refined petroleum products, and the
Bio-Synfining® technology for converting renewable feedstocks into drop-in
fuels. Syntroleum has a 50% interest in Dynamic Fuels, LLC, which operates a
75 million gallon per year renewable fuels facility located in Geismar,
Louisiana utilizing its Bio-Synfining® technology. For additional information,
visit the Company's web site at www.syntroleum.com

The Syntroleum Corporation logo is available at
http://www.globenewswire.com/newsroom/prs/?pkgid=5984

This document includes forward-looking statements within the meaning of the
Private Securities Litigation Reform Act of 1995, as well as historical facts.
These forward‑looking statements may include statements relating to the
Fischer-Tropsch ("FT") Process, Syntroleum® Process, the Synfining® Process,
and related technologies including, gas-to-liquids ("GTL"), coal-to-liquids
("CTL"), and biomass-to-liquids ("BTL"), our renewable fuels Bio-Synfining®
Technology, plants based on the Syntroleum® Process and/or Bio-Synfining®,
anticipated costs to design, construct and operate these plants, the time of
commencement and completion of the design and construction of these plants,
expected production of fuel, obtaining required financing for these plants and
our other activities, the economic construction and operations of
Fischer-Tropsch ("FT") and/or Bio-Synfining® plants, the value and markets for
products, testing, certification, characteristics and use of Plant products,
the continued development of the Syntroleum® Process and Bio-Synfining®
Technology and the anticipated capital expenditures, expense reductions, cash
outflows, expenses, use of proceeds from out equity offerings, anticipated
revenues, availability of catalyst, our support of and relationship with our
licensees, and any other forward-looking statements including future growth,
cash needs, capital availability, operations, business plans and financial
results. When used in this document, the words "anticipate," "believe,"
"estimate," "expect," "intend," "may," "plan," "project," "should" and similar
expressions are intended to be among the statements that identify
forward‑looking statements. Although we believe that the expectations
reflected in these forward‑looking statements are reasonable, these kinds of
statements involve risks and uncertainties. Actual results may not be
consistent with these forward‑looking statements. Syntroleum undertakes no
obligation to update or revise forward-looking statements to reflect changed
assumptions, the occurrence of unanticipated events or changes to future
operating results over time. Important factors that could cause actual results
to differ from these forward-looking statements are described under "Item 1A.
Risk Factors" and elsewhere in our 2011 Annual Report on Form 10K.

® "Syntroleum" is registered as a trademark and service mark in the U.S.
Patent and Trademark Office.

CONTACT: Ron Stinebaugh
         Syntroleum Corporation
         (281) 224-9862
         www.syntroleum.com

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