Grant of Patents

Tristel PLC 03 January 2007 For Immediate Release 3 January 2007 TRISTEL PLC Grant of Patents Tristel plc ('Tristel'), the AIM listed provider of infection and contamination control products, announces that it has been granted patents from the UK Patent Office for the Tristel Wipes Traceability System and the Tristel Dual Foam Sterilant. The Tristel Wipes Traceability System is used in the decontamination of heat sensitive medical instruments. The system is a practical and highly effective way to decontaminate heat sensitive, non-lumened instruments if endoscope washer-disinfectors, sinks or water supplies are not available. Importantly, the Tristel Wipes Traceability System enables users to conform to the Chief Medical Officer's Directive in 'Winning Ways' (Working together to reduce Hospital Acquired Infection), December 2003, which states that staff will ensure that there is an audit trail for each recycled item. The Tristel Dual Foam Sterilant is used for the high-level disinfection of surfaces in high risk areas of hospitals. The Tristel Dual Foam Sterilant delivers Tristel's proprietary chlorine dioxide chemistry directly to surfaces. Chlorine dioxide is highly effective in destroying all types of bacteria (including bacterial spores, tuberculosis and MRSA), fungi and viruses and is one of a small group of sporicidal agents that is safe and easy to use. Tristel's core product range of instrument disinfectants has become the market leader in the UK Acute & Private Hospital sector. They are used to decontaminate heat sensitive endoscopic and ultrasound instruments in over 375 hospitals, representing some 60 per cent of all UK NHS Acute & Private Hospitals. Contacts: Tristel plc Parkgreen Communications Ltd Paul Swinney Paul McManus Chief Executive Tel: 020 7851 7480 Tel: 01638 721 500 Mob: 07980 541 893 This information is provided by RNS The company news service from the London Stock Exchange