(under subclass 498) Subject matter wherein a gaseous fluid is utilized to shape, strengthen, or keep the cover above the surface of the water.
(1) Note. The gaseous fluid is applied when the cover is used: a buoyant cover wherein air is sealed permanently within the cover is placed in other subclasses.
SEE OR SEARCH THIS CLASS, SUBCLASS:
501+, for liquid means to raise a cover.
SEE OR SEARCH CLASS
52, Static Structures (e.g., Buildings),
2.11+, for a structure, or a component thereof, of that class which is shaped, supported or strengthened by an enclosed fluid. See (1) Note of subclass 2.11 for other locations of inflatable devices, elements, members, structures, etc..
