FR2820823-A1  J. S. LIEVOIS: "development of an automated, high pressure heat flux calorimeter and its application to measure the heat of dissociation and hydrate numbers of methane hydrate" FLUID PHASE EQILIBRIA, vol. 59, no. 1, 1990, pages 73-97, XP001051922;  C.A. KOH: "a dynamic study of the formation of the clathrate hydrates: in situ synchroton x-ray diffraction and diferential calorimetry" MATERIALS SCIENCE FORUM, vol. 228-231, 1996, pages 239-244, XP001051691;  DATABASE COMPENDEX en ligne proceedings 2000 spe: AN-E2001055445683, octobre 2000 (2000-10) DALMAZZONE C.: "differential calorimetry: a new technique to characterize hydrate formation in drilling muds" XP002187246;  DATABASE COMPENDEX [en ligne] proceedings 2000 spe: AN-E2001055445683, octobre 2000 (2000-10) DALMAZZONE C.: "differential calorimetry: a new technique to characterize hydrate formation in drilling muds" XP002187246;  R. M. RUEFF: "heat capacity and heat of dissociation of methane hydrates" AICHE JOURNAL, vol. 34, no. 9, 1988, pages 1468-1476, XP001051920;  DATABASE COMPENDEX October 2000 (2000-10-01), DALMAZZONE C.: "differential calorimetry: a new technique to characterize hydrate formation in drilling muds", XP002187246,relevantClaims[1,7],relevantPassages[&lt;pp&gt;A&lt;/pp&gt;];  R. M. RUEFF: "heat capacity and heat of dissociation of methane hydrates", AICHE JOURNAL, vol. 34, no. 9, 1988, pages 1468 - 1476, XP001051920,relevantClaims[1,7],relevantPassages[&lt;pp&gt;A&lt;/pp&gt;];  C.A. KOH: "a dynamic study of the formation of the clathrate hydrates: in situ synchroton x-ray diffraction and diferential calorimetry", MATERIALS SCIENCE FORUM, vol. 228-231, 1996, pages 239 - 244, XP001051691,relevantClaims[1,7],relevantPassages[&lt;pp&gt;A&lt;/pp&gt;];  J. S. LIEVOIS: "development of an automated, high pressure heat flux calorimeter and its application to measure the heat of dissociation and hydrate numbers of methane hydrate", FLUID PHASE EQILIBRIA, vol. 59, no. 1, 1990, pages 73 - 97, XP001051922,relevantClaims[1],relevantPassages[&lt;pp&gt;A&lt;/pp&gt;]US6571604-B2  Introducing the PYRIS Diamond DSC, author unknown, date unknown.*;  NIST, Micron Scale Differential Scanning Calorimeter, 6,4, 1998, author unknown.;  Rheometric Scientific, Differential Scanning Calorimeter DSC, Jan 1997, author unknown.*