Patent US3487291A successfully refreshed from Google Patents.
US3487291A
Expired / Lapsed
US
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Constant power control of a power source
Assignee: EDWARD J DOWGIALLO JR
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Filing: 1967-04-19
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Granted: 1969-12-30
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Expires: 1987-04-19
Abstract
No abstract record available.
Inventors
- 👤 Edward J Dowgiallo Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:42
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; H; H01; H01M; H01M10/00; H01M10/42; H01M10/48; H01M16/00; H01M16/003; H01M16/006; H01M50/00; H01M50/50; H01M50/569; H01M8/00; H01M8/04; H01M8/04298; H01M8/04313; H01M8/04537; H01M8/04574; H01M8/04589; H01M8/04694; H01M8/04858; H01M8/04925; H01M8/0494; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02E60/30; Y02E60/50
Claims Analysis
Total Claims: 0
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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) | 1972-12-29 | 1973-06-30 | 1973-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-29 | 1977-06-30 | 1977-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-29 | 1981-06-30 | 1981-12-30 | $7700.00 | Window Closed / Lapsed |