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PURE Bioscience Granted US Patent on SDC for Food Treatment

New Patent Protects PURE in Emerging Food Processing Market for SDC

SAN DIEGO, Oct. 30 /PRNewswire-FirstCall/ -- PURE Bioscience (Nasdaq: PURE) today announced that the United States Patent and Trademark Office issued patent number 7,435,438, which covers PURE's process for treating consumable food products with silver dihydrogen citrate (SDC) to reduce or eliminate microbial contamination. The new patent expands the scope of protection of PURE's core technology patent, US Patent 6,197,814, covering the composition and method of making of PURE's silver dihydrogen citrate (SDC) antimicrobial.


Michael L. Krall, President and CEO of PURE Bioscience, stated, "Food safety is an ongoing public health concern in the United States, and this new patent provides strategic protection for PURE as we explore applications for SDC in the food processing market with industry leading companies. We continue to build our patent portfolio, both in the US and abroad, to fully protect the numerous potential uses for SDC."

PURE Bioscience's EPA-registered SDC-based disinfectant is a powerful weapon against food borne pathogens, including E. coli, Campylobacter, Listeria, Norovirus and Salmonella. According to information published by the CDC in 2005, known pathogens causing food borne illness account for approximately 14 million illnesses, 60,000 hospitalizations and 1,800 deaths annually in the US.

PURE has four previously granted US patents related to the SDC technology: US Patent 6,197,814 (2001) for the SDC disinfectant and method of its making, Patent 6,583,176 (2003) covering the combination of SDC and alcohol as a disinfectant, Patent 6,890,953 (2005) covering a process for treating water with SDC and Patent 7,261,905 (2007) covering PURE's process of manufacturing complexes of electrolytically generated stabilized ionic silver with various organic acids. PURE also has numerous other patent applications pending in the US, including, among others, coverage of SDC in medical, personal care and preservative applications, the anhydrous - or crystalline - form of SDC, and SDC in combination with traditional chemical disinfectants. In addition, patents have issued or are pending for PURE's SDC technology in approximately 70 countries.

About PURE Bioscience

PURE Bioscience develops and markets technology-based bioscience products that provide solutions to numerous global health challenges, including Staph (MRSA). PURE's proprietary high efficacy/low toxicity bioscience technologies, including its silver dihydrogen citrate-based antimicrobials, represent innovative advances in diverse markets and lead today's global trend toward industry and consumer use of "green" products while providing competitive advantages in efficacy and safety. Patented SDC is an electrolytically generated source of stabilized ionic silver which formulates well with other compounds. As a platform technology, SDC is distinguished from competitors in the marketplace because of its superior efficacy, reduced toxicity and the inability of bacteria to form a resistance to it. PURE is headquartered in El Cajon, California (San Diego metropolitan area). Additional information on PURE is available at

This press release includes statements that may constitute "forward- looking" statements, usually containing the words "believe," "estimate," "project," "expect" or similar expressions. These statements are made pursuant to the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Forward-looking statements inherently involve risks and uncertainties that could cause actual results to differ materially from the forward-looking statements. Factors that would cause or contribute to such differences include, but are not limited to, acceptance of the Company's current and future products and services in the marketplace, the ability of the Company to develop effective new products and receive regulatory approvals of such products, competitive factors, dependence upon third-party vendors, and other risks detailed in the Company's periodic report filings with the Securities and Exchange Commission. By making these forward-looking statements, the Company undertakes no obligation to update these statements for revisions or changes after the date of this release.

PURE Bioscience Investor Contact:

Paul G. Henning, Vice President

Cameron Associates

(212) 554-5462

PURE Press Contact:

Suzanne Matick

Gutenberg Communications

(831) 479-1888

SOURCE PURE Bioscience
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