Global Patent Index - EP 0995100 A1

EP 0995100 A1 2000-04-26 - METHOD FOR DETERMINING THE DENSITY OF A GAS

Title (en)

METHOD FOR DETERMINING THE DENSITY OF A GAS

Title (de)

VERFAHREN ZUR BESTIMMUNG DER DICHTE EINES GASES

Title (fr)

PROCEDE POUR DETERMINER LA MASSE VOLUMIQUE D'UN GAZ

Publication

EP 0995100 A1 (FR)

Application

EP 98935091 A

Priority

  • FR 9801424 W
  • FR 9708747 A

Abstract (en)

[origin: FR2765966A1] The invention concerns a method for determining the density of a gas consisting in: filling a chamber (12) capable of sustaining the pressure without noticeable deformation with a gas whereof the density is to be determined and providing an initial pressure Pi higher than normal atmospheric pressure, by pressurised supply means (20); allowing said gas to escape through purging means (30) provided with a sonic nozzle (40), and measuring the time DELTA t taken by the gas to pass, inside the chamber (12), from a first pressure P1 not higher than the initial pressure Pi, to a second pressure P2 lower than said initial pressure P1; computing the density rho of the gas being analysed using a general theoretical formula stored in a computer (60) memory and including said measured time DELTA t and the gas temperature T, and a constant k obtained by the calibrating computer calibration (60) on the basis of a reference gas whereof the density is known.

IPC 1-7 (main, further and additional classification)

G01N 9/32; G01N 9/26

IPC 8 full level (invention and additional information)

G01N 9/26 (2006.01); G01N 9/32 (2006.01)

CPC (invention and additional information)

G01N 9/266 (2013.01); G01N 9/32 (2013.01)

Citation (search report)

See references of WO 9902964A1

Designated contracting state (EPC)

AT BE CH DE DK ES FI FR GB GR IE IT LI LU NL PT SE

EPO simple patent family

FR 2765966 A1 19990115; FR 2765966 B1 19990820; CA 2303805 A1 19990121; EP 0995100 A1 20000426; JP 2001509594 A 20010724; WO 9902964 A1 19990121

INPADOC legal status


2001-07-25 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20010109

2000-10-11 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20000829

2000-05-03 [RIN1] INVENTOR (CORRECTION)

- Inventor name: CORNIL, JEAN-PHILIPPE

2000-05-03 [RIN1] INVENTOR (CORRECTION)

- Inventor name: COTTERCHIO, MICHEL

2000-05-03 [RIN1] INVENTOR (CORRECTION)

- Inventor name: VULOVIC, FREDERIC

2000-04-26 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19991216

2000-04-26 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU NL PT SE