US3873860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
MHD power generation
Assignee: United States Department of the Interior
•
Filing: 1973-11-21
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Granted: 1975-03-25
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Expires: 1993-11-21
Abstract
Abstract Mixed potassium-cesium seeding of a high temperature combustion gas is employed in production of electricity by means of an opencycle MHD generator.
Inventors
- 👤 Perry D Bergman
- 👤 Daniel Bienstock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:47
CPC Classifications
H; H02; H02K; H02K44/00; H02K44/08
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
61 words
IN A METHOD FOR PRODUCING ELECTRICAL ENERGY BY PASSING A SEEDED HIGH TEMPERATURE GASEOUS COMBUSTION PRODUCT, OBTAINED BY COMBUSTION OF COAL, AT HIGH VELOCITY THROUGH A MHD DUCT, THE IMPROVEMENT COMPRISING EMPLOYING AS SEEDING MATERIAL A MIXTURE OF POTASSIUM AND CESIUM COMPOUNDS IN WHICH THE POTASSIUM COMPRISES ABOUT 75 TO 95 ATOMIC PERCENT OF THE TOTAL POTASSIUM-CESIUM CONTENT OF THE SEED.
Claim 2
Dependent Claim
61 words
IN A METHOD FOR PRODUCING ELECTRICAL ENERGY BY PASSING A SEEDED HIGH TEMPERATURE GASEOUS COMBUSTION PRODUCT, OBTAINED BY COMBUSTION OF COAL, AT HIGH VELOCITY THROUGH A MHD DUCT, THE IMPROVEMENT COMPRISING EMPLOYING AS SEEDING MATERIAL A MIXTURE OF POTASSIUM AND CESIUM COMPOUNDS IN WHICH THE POTASSIUM COMPRISES ABOUT 75 TO 95 ATOMIC PERCENT OF THE TOTAL POTASSIUM-CESIUM CONTENT OF THE SEED.
Claim 3
Dependent Claim
29 words
The method of claim 1 in which the seeding material consists of about 78 percent by weight of potassium sulfate and about 22 percent by weight of cesium oxide.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |