US PATENT SUBCLASS 60 / 646
.~.~ Including start up, shut down, cleaning, protective or maintenance procedure


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

Internet Version by PATENTEC © 1999      Terms of Use



60 /   HD   POWER PLANTS

643  DF  MOTIVE FLUID ENERGIZED BY EXTERNALLY APPLIED HEAT {11}
645  DF  .~ Process of power production or system operation {9}
646.~.~ Including start up, shut down, cleaning, protective or maintenance procedure


DEFINITION

Classification: 60/646

(under subclass 645) Process, including a manipulation that (1) puts a nonoperating power producer into operation; (2) that takes an operating power producer out of operation; (3) maintains a power producer in a nonoperating state but in condition for a rapid start; (4) protects the apparatus from damage; or (5) maintains it in operating condition as by cleaning or purging.

SEE OR SEARCH THIS CLASS, SUBCLASS:

656, for apparatus energized by externally applied heat having ancillary structure for starting; and subclasses 657+, for a heat operated apparatus having cleaning, sealing, lubricating, purging, standby or protecting feature.