(19)
(11) EP 1 098 709 A1

(12)

(43) Date of publication:
16.05.2001 Bulletin 2001/20

(21) Application number: 99937891.2

(22) Date of filing: 02.03.1999
(51) International Patent Classification (IPC)7B01L 3/00
(86) International application number:
PCT/GB9900/623
(87) International publication number:
WO 9944/740 (10.09.1999 Gazette 1999/36)
(84) Designated Contracting States:
CH DE FR GB LI NL SE

(30) Priority: 02.03.1998 GB 9804483

(71) Applicant: CENTRAL RESEARCH LABORATORIES LIMITED
Hayes,Middlesex, UB3 1HH (GB)

(72) Inventor:
  • SHAW, John, Edward, Andrew
    West DraytonMiddlesex UB7 7AL (GB)

(74) Representative: Walker, Neville Daniel Alan et al
QED I.P. Services LimitedDawley Road
Hayes, Middlesex UB3 1HH
Hayes, Middlesex UB3 1HH (GB)

   


(54) APPARATUS FOR, AND METHOD OF, VARYING THE RATE OF FLOW OF FLUID ALONG A PATHWAY