ClassID:

137096

F01K21/02 - CPC Classification

Classification description:

Steam engine plants not otherwise provided for with steam-generation in engine-cylinders

Recent Application in this class:
#1
20250223905
2025-07-10

STEAM ENGINE

#2
20170362963
2017-12-21

PASSIVE ALTERNATOR DEPRESSURIZATION AND COOLING SYSTEM

#3
20160160693
2016-06-09

MULTI-FLUID THERMAL ENERGY CONVERSION SYSTEM

#4
20150352940
2015-12-10

Cryogenic engine system

#5
20130081390
2013-04-04

Vaporization method and vaporization apparatus used for vaporization method, and vaporization system provided with vaporization apparatus

#6
20120240897
2012-09-27

HEAT ENGINE IMPROVEMENTS

#7
20110030646
2011-02-10

JET EXHAUST PISTON ENGINE

#8
20100300097
2010-12-02

HEAT ENGINE

#9
20100288248
2010-11-18

Hybrid engine

#10
20100218741
2010-09-02

Thermal engine for operation with combustible and noncombustible fuels and electric energy

#11
20100083658
2010-04-08

Heat engine improvements

#12
20090100832
2009-04-23

Piston steam engine with internal flash vaporization of a work medium

#13
20080216480
2008-09-11

Internal combustion engine with auxiliary steam power recovered from waste heat

#14
20080093477
2008-04-24

Working - Fluid Injector for a Piston Steam Engine

#15
20080072596
2008-03-27

Nunley steam engine

#16
20070251238
2007-11-01

Steam Engine Device and Methods of Use

#17
20070245734
2007-10-25

Internal steam engine

#18
20070151969
2007-07-05

Heat-pipe electric-power generating device

#19
20060005541
2006-01-12

Water powered engine

#20
20050268611
2005-12-08

Steam engine

#21
15077576
2017-11-28

High efficiency steam engine and steam expander

#22
15007428
2019-03-19

Method and apparatus utilizing thermally conductive pumps for conversion of thermal energy to mechanical energy