U.S. Patent Office Institutes Inter Partes Review of All Claims of Neste's '094 Patent

U.S. Patent Office Institutes Inter Partes Review of All Claims of Neste's
'094 Patent

TULSA, Okla., Sept. 5, 2013 (GLOBE NEWSWIRE) -- Syntroleum Corporation
(Nasdaq:SYNM) announced today the U.S. Patent & Trademark Office Patent Trial
and Appeal Board ("PTO") decision issued on September 4, 2013 instituting an
inter partes review ("IPR") of all claims of Neste Oil's U.S. Patent No.
8,212,094. This decision follows Syntroleum's filing in March 2013 of its IPR
petition challenging the validity of the '094 patent. The PTO found that
"there is a reasonable likelihood that Syntroleum would prevail with respect
to claims 1-20 of the '094 patent" based on the information presented.

Neste may file its response to Syntroleum's petition, including any motion to
amend the '094 patent, by November 4, 2013. Syntroleum can then respond to
Neste's submissions by January 6, 2014. Subsequently, the parties will have an
opportunity to cross-examine witnesses and prepare for oral argument, now
scheduled for April 1, 2014.Shortly afterward, the PTO will issue a final
decision on the validity of the '094 patent claims.

Syntroleum and Neste are also parties to related district court litigation
filed by Neste on December 20, 2012 involving the '094 patent, Neste Oil, Oyj
v. Syntroleum Corp. et al., 12cv1744 (D. Del.).On July 2, 2013, the District
Court stayed this lawsuit in view of the pending IPR petition.Likewise, an
earlier lawsuit filed by Neste on May 29, 2012 involving its U.S. Patent No.
8,187,344 was stayed by the District Court based on Syntroleum's inter partes
reexamination request regarding the '344 patent.To date, the PTO has rejected
both the original claims of the '344 patent, as well as the amended and new
claims submitted by Neste, as obvious in view of the prior art.The '344
reexamination proceedings remain pending at the PTO under Reexam Control
Number 95/002,084.

Syntroleum denies Neste's infringement claims and will continue to vigorously
defend against the Neste patents, and remains confident that its position will
be vindicated.Syntroleum has invested substantial time and resources in its
proprietary Bio-Synfining® technology and will likewise seek to defend and
enforce its intellectual property rights in venues around the world.

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 products, the Bio-Synfining®
technology for converting renewable feedstocks into drop-in fuels and a 50%
interest in Dynamic Fuels, LLC, which owns a 75 million gallon per year
Geismar, Louisiana renewable fuels plant using the Bio-Synfining®
technology.For additional information, visit the Company's web site at
www.syntroleum.com

This document may contain forward-looking statements within the meaning of the
Private Securities Litigation Reform Act of 1995, as well as historical facts.
These forward-looking statements include statements relating to the
Fischer-Tropsch ("FT") process, Syntroleum ® Process, 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 (hereinafter "Technologies"), plants based on these Technologies,
anticipated cost and schedule to design, construct and operate plants,
expected production of fuel, obtaining required financing for these plants and
other activities, the value and markets for products, testing, certification,
characteristics and use of plant products, the continued development of our
Technologies, use of proceeds from our 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 2012 Annual Report on Form 10K.

®"Syntroleum", "Synfining", and "Bio-Synfining" are registered as trademarks
and service marks in the U.S. Patent and Trademark Office.

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

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