US3139541A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Generation of power using emissive materials
Assignee: Monsanto Co
•
Filing: 1961-11-20
•
Granted: 1964-06-30
•
Expires: 1981-11-20
Abstract
No abstract record available.
Inventors
- 👤 Courtland M Henderson
- 👤 Robert G Ault
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:11
CPC Classifications
H; H01; H01J; H01J45/00; H01J1/00; H01J1/02; H01J1/13; H01J1/14; H01J17/00; H01J17/02; H01J17/04; H01J17/06; H01J17/066; H01J2893/00; H01J2893/0064; H01J2893/0065; H01J2893/0066
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1922244A
Cited
US2700000A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-30 | 1967-12-30 | 1968-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-30 | 1971-12-30 | 1972-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-30 | 1975-12-30 | 1976-06-30 | $7700.00 | Window Closed / Lapsed |