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Sionex Continues to Strengthen its Patent Portfolio

Company has added 7 patents to its portfolio so far in 2006

BEDFORD, Mass.- October 17, 2006 - Sionex Corporation, a company focused on commercializing breakthrough chemical and biological sensors and sub-systems, today announced that the US Patent Office has issued a further seven (7) patents to add to its existing portfolio.

The newly issued US patents;
7,119,328 B2	System for DMS peak resolution.
7,098,449	Spectrometer chip assembly.
7,091,481 B2	Method and apparatus for plasma generation.
7,075,068 B2	Method and apparatus for electrospray augmented high field asymmetric ion mobility spectrometer.
7,030,372	Micromachined field asymmetric ion mobility filter and detection.
7,057,168	Systems for differential mobility analysis.

These newly issued patents add to Sionex's core IP for the microDMx™ technology and further extend its applicability for a wide range of analysis, monitoring and detection scenarios. The microDMx technology allows the detection of chemical compounds down to parts per trillion (ppt) levels with a degree of specificity unmatched by any other current technology.

"Sionex is continually strengthening our patent portfolio as a key strategy," said Raanan Miller, Sionex's founder and chief technology officer. "Part of that strategy is to foster and develop key relationships and collaborations with world-class research institutes and academia. We still have an extremely close relationship with The Charles Stark Draper Laboratory in Cambridge, MA, for developments and improvements to our technology."

Sionex was founded in 2001 with technology exclusively licensed from The Charles Stark Draper Laboratory where Sionex has exclusive commercialization rights to this core IP. Sionex has existing commercial agreements with Varian, Inc., Thermo Electron Corporation and General Dynamics for the detection of industrial chemicals, explosives and chemical warfare agents.

About Sionex Corporation
Sionex Corporation is focused on commercializing breakthrough chemical and biological sensor chips and systems based on its proprietary microDMx detection technology. Sionex maintains its worldwide headquarters and laboratories in Bedford, Massachusetts. The Company is privately held and was founded in 2001 with patented technology licensed exclusively from The Charles Stark Draper Laboratory. Additional information about Sionex Corporation is available at www.sionex.com.

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microAnalyzer™ and microDMx™ are trademarks of Sionex Corporation.

Forward-looking Statement
Some statements in this announcement constitute forward-looking statements. Forward-looking statements involve known and unknown risks, uncertainties and other factors which may cause the actual results, performance or achievements of Sionex Corporation to be materially different from any future results, performance or achievements expressed or implied by such forward-looking statements. There can be no assurance that the forward-looking statements included in this announcement will prove to be accurate. In light of the significant uncertainties inherent in the forward-looking statements included herein, the inclusion of this information should not be regarded as a representation by the Company or any other person that the objectives and plans of the Company will be achieved.

EDITORIAL CONTACTS:
Eric Kirleis
(781) 457-5416
ekirleis@sionex.com

Public Relations Agency Contact:
Doug Forsyth, Alchymia Communications® LLC
(541) 482-8744
df@alchymiacomm.com

microDMx™ and Protection by Detection™ are trademarks of Sionex Corporation.