VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES

**Definition:** This place covers:

Groups in the 2000-range:

The groups F17C2201/00 - F17C2209/00 cover features of the pressure vessel itself:

The groups F17C2221/00 - F17C2227/00 consider the fluid contained in the pressure vessel and its charging and discharging into and from the pressure vessel.

Layout of definition statements:

"Positive" examples have been chosen among patents to illustrate the definition statement and what is to be classified in the groups of the 2000 range. The qualifying features are marked in green in these drawings.

To illustrate the boundaries of the definition statement, "negative" examples have been chosen among patents to illustrate what would not lead to or even disqualify from a classification in a group. The corresponding features are marked in red in these drawings.

**Limiting references (this place does not cover):** - Storing fluids in natural or artificial cavities or chambers in the earth -> B65G5/00 - Variable-capacity gas holders -> F17B

**Glossary:** - Gas: substance that is in gaseous state of matter at normal conditions (atmospheric pressure and normal ambient temperature. Substances that are in a gaseous state of matter but would not be gaseous at normal conditions are not considered in this subclass. Gas can be put in liquid (liquefied gas), or solidified state of matter, for transport and storage - Pressure vessel: container containing gas for storage and/or transport - Fluid or handled fluid: fluid contained in, charged into or discharged out of the pressure vessel