| Patents for F01K 25 - Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for (4,827) |
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| 03/01/1977 | US4009575 Regeneration power cycleexothermic and endothermic reactions |
| 02/22/1977 | US4008573 Motive fluids for external combustion engines |
| 02/08/1977 | US4006595 Refrigerant-powered engine |
| 02/01/1977 | US4005580 Seal system and method |
| 01/18/1977 | US4003204 Fuel regenerated non-polluting internal combustion engine |
| 12/21/1976 | US3998059 Power systems |
| 12/07/1976 | US3995429 Apparatus for generating power using environmental temperature differentials |
| 11/09/1976 | US3990245 Energy converter device |
| 11/02/1976 | US3988895 Power generation from hot brines |
| 10/26/1976 | US3987633 Pressurized gas operated engine |
| 10/26/1976 | US3987632 Liquid air engine |
| 10/19/1976 | US3986362 Geothermal power plant with intermediate superheating and simultaneous generation of thermal and electrical energy |
| 10/19/1976 | US3986359 Thermodynamic engine system and method |
| 08/31/1976 | US3977191 Atomic expansion reflex optics power optics power source (aerops) engine |
| 08/24/1976 | US3975914 Implosion engine |
| 08/24/1976 | US3975913 Gas generator and enhanced energy conversion systems |
| 08/03/1976 | US3972195 Two-phase engine |
| 07/27/1976 | US3971211 Thermodynamic cycles with supercritical CO2 cycle topping |
| 07/20/1976 | US3970055 Uniflow-type external combustion engine featuring double expansion and rotary drive |
| 07/06/1976 | US3967450 Power-generation system comprising an engine actuated by the expansion of a liquefiable gaseous fluid |
| 06/08/1976 | US3961485 Turbine with heat intensifier |
| 03/23/1976 | US3945211 Vacuum engine |
| 03/23/1976 | US3945210 Energy recovery |
| 03/16/1976 | US3944494 Stabilization of trichlorodifluoro benzenes |
| 03/16/1976 | US3943719 Hydride-dehydride power system and methods |
| 03/02/1976 | US3940939 Vapor cycle engine having a trifluoroethanol and ammonia working fluid |
| 02/17/1976 | US3938335 Heat engines |