(19)
(11) EP 1 611 437 B8

(12) CORRECTED EUROPEAN PATENT SPECIFICATION
Note: Bibliography reflects the latest situation

(15) Correction information:
Corrected version no 1 (W1 B1)

(48) Corrigendum issued on:
17.02.2010 Bulletin 2010/07

(45) Mention of the grant of the patent:
18.11.2009 Bulletin 2009/47

(21) Application number: 04737310.5

(22) Date of filing: 08.03.2004
(51) International Patent Classification (IPC): 
G01N 27/62(2006.01)
(86) International application number:
PCT/US2004/006981
(87) International publication number:
WO 2004/081523 (23.09.2004 Gazette 2004/39)

(54)

GAS DETECTOR WITH MODULAR DETECTION AND DISCHARGE SOURCE CALIBRATION

GASDETEKTOR MIT MODULARER DETEKTION UND ENTLADUNGSQUELLENKALIBRATION

DETECTEUR DE GAZ A DETECTION LINEAIRE ET ETALONNAGE DE LA SOURCE DE DECHARGE

(84) Designated Contracting States:
CH DE FR GB IT LI

(30) Priority: 11.03.2003 US 387011

(43) Date of publication of application:
04.01.2006 Bulletin 2006/01

(73) Proprietor: VALCO INSTRUMENTS COMPANY, INC.
Houston, Texas 77255 (US)

(72) Inventors:
  • STEARNS, Stanley
    Houston, TX 77255 (US)
  • CAI, Huamin
    Houston, TX 77096 (US)

(74) Representative: Feakins, Graham Allan et al
Murgitroyd & Company 165-169 Scotland Street
Glasgow, G5 8PL
Glasgow, G5 8PL (GB)


(56) References cited: : 
DE-A1- 4 038 994
US-A- 5 294 794
US-B1- 6 448 777
 US-A- 3 634 754
US-A- 5 602 468
US-B1- 6 509 562
   
  • CAI H ET AL: "PULSED DISCHARGE ELECTRON CAPTURE DETECTOR OPERATING IN THE CONSTANT-CURRENT MODE BY MEANS OF FEEDBACK DC BIAS VOLTAGE" ANALYTICAL CHEMISTRY, AMERICAN CHEMICAL SOCIETY. COLUMBUS, US, vol. 70, no. 18, 15 September 1998 (1998-09-15), pages 3770-3776, XP000784043 ISSN: 0003-2700
   
Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).