Patent Estate

(US PATENT AND TRADEMARK OFFICE CLASS 62/936)

The U.S. Patent Office has awarded Energy Concepts 28 patents on heat-activated cooling technology, encompassing absorption cycles, working fluids, and components. Another 27 patents were granted in fluid contacting apparatus(cryogenic distillation). In recognition of the cutting-edge position of the ECC patents, the Patent Office has created a new cross-reference class of patents consisting solely of those patents: class 62-936.

1. 3,975,913 Gas Generator and Enhanced Energy Conversion Systems. August 24, 1976.
2. 4,126,668 Production of Hydrogen Rich Gas by Combined Steam Reforming and Intermediate Oxidation Reduction. November 12, 1978.
3. 4,132,766 Separation of Oxygen from Gaseous Mixtures with Molten Alkali Metal Salts. January 2, 1979.
4. 4,173,619 Combustion Gas Desulfurization. November 6, 1979.
5. 4,207,298 High Temperature Removal of H2S from Reducing Gas. June 10, 1980.
6. 4,216,199 Hydrogen Production From Carbonaceous Fuels Using Intermediate OxidationReduction. August 5, 1980.
7. 4,283,374 Regenerable Manganese Oxide Hot Gas Desulfurization Process. August 11, 1981.
8. 4,287,170 Nitrogen and Oxygen Via Chemical Air Separation. September 1, 1981.
9. 4,310,503 Hydrogen Production by Multistaged Intermediate OxidationReduction. January 12, 1982.
10. 4,340,578 Oxygen Production by Molten Alkali Metal Salts. July 20, 1982.
11. 4,350,571 Absorption Heat Pump Augmented Thermal Separation Process. September 21, 1982.
12. 4,357,153 Internally Heat Pumped Single Pressure Distillative Separations. November 2, 1982.
13. 4,357,308 Dual Temperature Dual Alkali Desulfurization. November 2, 1982.
14. 4,402,795 Reverse Absorption Heat Pump Augmented Distillation Process. September 6, 1983.
15. 4,433,989 Air Separation with Medium Pressure Enrichment. February 28, 1984.
16. 4,454,724 Aqueous Absorbent for Absorption Cycle Heat Pump. June 19, 1984.
17. 4,464,191 Cryogenic Gas Separation with Liquid Exchanging Columns. August 7, 1984.
18. 4,521,398 Controlled Temperature Expansion in Oxygen Production by Molten Alkali Metal Salts. June 4, 1985.
19. 4,533,375 Cryogenic Air Separation with Cold Argon Recycle. August 6, 1985.
20. 4,563,295 High Temperature Absorbent for Water Vapor. January 7, 1986.
21. 4,578,095 Low Energy High Purity Oxygen Plus Argon. March 25, 1986.
22. 4,582,518 Nitrogen Production by Low Energy Distillation. April 15, 1986.
23. 4,604,116 High Pressure Oxygen Pumped LOX Rectifier. August 5, 1986.
24. 4,605,427 Cryogenic Triple Pressure Air Separation with LPtoMP Latent Heat Exchange. August 12, 1986.
25. 4,614,605 Water Vapor Absorbent Containing Cesium Hydroxide. September 30, 1986.
26. 4,652,279 Thermally Stable Noncorrosive Water Vapor Absorbent. March 24, 1987.
27. 4,670,031 Increased Argon Recovery from Air Distillation. June 2, 1987.
28. 4,715,874 Retrofittable Argon Recovery Improvement to Air Separation. December 29, 1987.
29. 4,737,177 Air Distillation Improvements for High Purity Oxygen. April 12, 1988.
30. 4,744,224 Intermittent Solar Ammonia Absorption Cycle Refrigerator. May 17, 1988.
31. 4,746,502 Liquid Phase Thermal Swing Chemical Air Separation. May 24, 1988.
32. 4,756,731 Oxygen and Argon by Backpressured Distillation. July 12, 1988.
33. 4,769,055 Companded Total Condensation Reboil Cryogenic Air Separation. September 6, 1988
34. 4,775,399 Air Fractionation Improvements for Nitrogen Production. October 4, 1988
35. 4,777,803 Air Partial Expansion Refrigeration for Cryogenic Air Separation. October 18, 1988.
36. 4,781,739 Low Energy High Purity Oxygen Increased Delivery Pressure. November 1, 1988.
37. 4,783,209 Cryogenic Air Distillation with Companded Nitrogen Refrigeration. November 8, 1988
38. 4,784,783 Nonvolatile Highlift Ammonia Vapor Absorbent. November 15, 1988.
39. 4,796,431 Nitrogen Partial Expansion Refrigeration for Cryogenic Air Separation. January 10, 1989.
40. 4,801,393 High Temperature NonOxidizing Water Vapor Absorbent. January 31, 1989.
41. 4,803,958 Absorption Heat Pumped Cogeneration Engine. February 14,1989.
42. 4,817,393 Companded Total Condensation LOXBOIL Air Distillation. April 4, 1989.
43. 4,817,394 Optimized Intermediate Height Reflux for Multipressure Air Distillation. April 4, 1989.
44. 4,824,527 Nested Enrichment Cascade Distillation of Unequal Mixtures. April 25, 1989.
45. 4,832,719 Enhanced Argon Recovery from Intermediate LINBOIL. May 23, 1989.
46. 4,846,240 High COP Absorption Heat Pumped Evaporation Method and Apparatus. July 11, 1989.
47. 4,854,954 Rectifier Liquid Generated Intermediate Reflux for Subambient Cascades. August 8, 1989.
48. 4,966.014 Improvements to Solar Absorption Refrigeration. October 30, 1990
49. 5,016,444 One-And-A-Half Effect Absorption Cycle. May 21, 1991.
50. 5,024,063 Branched GAX Absorption Vapor Compressor. June 18, 1991.
51. 5,033,274 Rectification Reflux by Latent Heat Exchange with Partially Depressurized Absorbent. July 23, 1991.
52. 5,097,676 Vapor Exchange Duplex GAX Absorption Cycle. March 24, 1992.
53. 5,272,891 Intermittent Sorption Cycle with Integral Thermosyphon. December 28, 1993.
54. 5,279,359 Rotary Trisorption Heat Pump (R3HP), January 18, 1994.
55. 5,309,985 Stationary ContinuousMultimodular Trisorption Heat Pump. May 10, 1994.
56. 5,408,847 Rotary Solid Sorption Heat Pump With Embedded Thermosyphons. April 25, 1995.
57. 5,572,885 Shrouded Coiled Crested Tube Diabatic Mass Exchanger. November 12, 1996.
58. 5,653,116 Triple-Effect Absorption Cycle With Condensate-to-Solution Sensible Heat Exchanger, August 5, 1997.
59. 5,660,049 Sorber With Multiple Cocurrent Pressure Equalized Upflows. August 26, 1997.
60. 5,713,216 Coiled Tubular Diabatic Vapor-Liquid Contactor. February 3, 1998.
61. 5,766,519 Locally Cocurrent Globally Crosscurrent Pressure-Equalized Absorber and Process. June 16, 1998.
62. 5,771,710 Thermosyphon Cooled Absorber for Air Cooled Absorption Cycles. June 30, 1998.
63. 5,798,086 Intensified Locally Cocurrent Tray Contactors. August 25, 1998.
64. 6,158,241 LPG Recovery from Reformer Treat Gas. December 12, 2000.
65. 6,203,718 B1 Aqueous Ammonia Corrosion Inhibitor, March 20, 2001
66. 6,269,644 B1 Absorption Power Cycle with Two Pumped Absorbers. August 7, 2001.
67. 6,412,291 B1 Air Compression Improvement. July 2, 2002.
68. 6,584,801 B2 Absorption Cycle with Integrated heating System. July 1, 2003
69. 6,585,238 B1 Locally Co-Current Horizontally Staged Contact Tray. July 1, 2003.
70. 6,631,892 B1 Tray Contactor with Same Direction Liquid Flow (CoFlow Tray) October 14, 2003
71. 6,679,083 B1 Opposed Slant Tube Diabatic Sorber, January 20, 2004
72. 6,715,290 Fluid Mixture Separation by Low Temperature Glide Heat, April 6, 2004
73. 6,739,119 B2 Combustion Engine Improvement, May 28, 2004
74. Steam Ammonia Power Cycle (allowed, will be issued in 2005)