|  | F |
SECTION F — MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

LIGHTING AND HEATING

|  | F25 |
REFRIGERATION OR COOLING; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION OR SOLIDIFICATION OF GASES

|  | F25J |
LIQUEFACTION, SOLIDIFICATION, OR SEPARATION OF GASES OR GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT (cryogenic pumps Fulltext... Hierarchy... Expanded...F04B 37/08; gas storage vessels, gas-holders Fulltext... Hierarchy... Expanded...F17; filling vessels with, or discharging from vessels, compressed, liquefied, or solidified gases Fulltext... Hierarchy... Expanded...F17C; refrigeration machines, plants, or systems Fulltext... Hierarchy... Expanded...F25B)

|  | F25J 1/00 |
Processes or apparatus for liquefying or solidifying gases or gaseous mixtures

|  | F25J 1/02 |
· | requiring the use of refrigeration, e.g. of helium or hydrogen

|  | F25J 3/00 |
Processes or apparatus for separating the constituents of gaseous mixtures involving the use of liquefaction or solidification

|  | F25J 3/02 |
· | by rectification, i.e. by continuous interchange of heat and material between a vapour stream and a liquid stream (Fulltext... Hierarchy... Expanded...F25J 3/08 takes precedence)

|  | F25J 3/04 |
· · | for air

|  | F25J 3/06 |
· | by partial condensation (Fulltext... Hierarchy... Expanded...F25J 3/08 takes precedence; by rectification Fulltext... Hierarchy... Expanded...F25J 3/02)

|  | F25J 3/08 |
· | Separating gaseous impurities from gases or gaseous mixtures (cold traps Fulltext... Hierarchy... Expanded...B01D 8/00)

|  | F25J 5/00 |
Arrangements of cold-exchangers or cold-accumulators in separation or liquefaction plants (heat-exchangers per se Fulltext... Hierarchy... Expanded...F28C, Fulltext... Hierarchy... Expanded...F28D, Fulltext... Hierarchy... Expanded...F28F)