Filters for vacuum cleaners, vacuum loaders, canister vacuums, dust collectors, wet industrial vacuums, dry industrial vacuums, and pneumatic conveyors; filter compartments; filter housings; filter cleaners; reverse air-pulse filter cleaners; all of the preceding for use with vacuum cleaners, vacuum loaders, canister vacuums, dust collectors, wet industrial vacuums, dry industrial vacuums, and pneumatic conveyors