(19)

(11)

EP 2 361 321 A2

(12)

(88) Date of publication A3: 15.07.2010 (43) Date of publication: 31.08.2011 Bulletin 2011/35 (21) Application number: 09740186.3 (22) Date of filing: 16.10.2009

(51) International Patent Classification (IPC):  C23C 14/56(2006.01) A43B 1/00(2006.01) B01J 3/00(2006.01) H01J 37/32(2006.01) (86) International application number: PCT/GB2009/002499 (87) International publication number: WO 2010/046636 (29.04.2010 Gazette 2010/17)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR (30) Priority: 23.10.2008 GB 0819474 (71) Applicant: P2i Limited Abingdon, Oxfordshire OX14 4SA (GB)	(72) Inventor: KING, Charles, Edmund Oxfordshire OX5 1EH (GB) (74) Representative: Brewster, Andrea Ruth et al Greaves Brewster LLP Indigo House Cheddar Business Park Wedmore Road GB-Cheddar, Somerset BS27 3EB GB-Cheddar, Somerset BS27 3EB (GB)