US PATENT SUBCLASS 122 / 437
.~ Safety valve


Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use



122 /   HD   LIQUID HEATERS AND VAPORIZERS

412  DF  FEED HEATERS {17}
437.~ Safety valve


DEFINITION

Classification: 122/437

(under subclass 412) Subject matter comprising a conduit leading from a boiler safety valve to a water receptacle for heating the water when the steam escapes from the safety valve.