US PATENT SUBCLASS 277 / 913
SEAL FOR FLUID PRESSURE BELOW ATMOSPHERIC (E.G., VACUUM, ETC.)

Current as of: June, 1999
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277 /   HD   SEAL FOR A JOINT OR JUNCTURE

913SEAL FOR FLUID PRESSURE BELOW ATMOSPHERIC (E.G., VACUUM, ETC.)

DEFINITION

Classification: 277/913

SEAL FOR FLUID PRESSURE BELOW ATMOSPHERIC (E.G., VACUUM, ETC.):

(under the class definition) Sealing means intended to maintain a sealed fluid at a pressure lower than air pressure from its surrounding environment.