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US3437847A
Expired / Lapsed
US
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Cascaded thermionic-thermoelectric devices utilizing heat pipes
Assignee: United States Department of the Air Force
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Filing: 1967-08-29
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Granted: 1969-04-08
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Expires: 1987-08-29
Abstract
No abstract record available.
Inventors
- 👤 David Raspet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:28
CPC Classifications
H; H01; H01J; H01J45/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3321646A
Cited
US3189765A
Cited
US3279028A
Cited
US3329532A
Cited
US3368084A
Cited
FR1451700A
Cited
US3302042A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-07 | 1972-10-07 | 1973-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-07 | 1976-10-07 | 1977-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-07 | 1980-10-07 | 1981-04-08 | $7700.00 | Window Closed / Lapsed |