US2430381A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant voltage rectifier power supply
Assignee: Duracell Inc USA
•
Filing: 1944-08-18
•
Granted: 1947-11-04
•
Expires: 1964-08-18
Abstract
No abstract record available.
Inventors
- 👤 Robert O Whitesell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:05
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/12; G05F1/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1163708A
Cited
US1662889A
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US1485076A
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US1614147A
Cited
US1722152A
Cited
US1753921A
Cited
US1808717A
Cited
US1963186A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-11-03 | 1951-05-05 | 1951-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-11-03 | 1955-05-05 | 1955-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-11-03 | 1959-05-05 | 1959-11-04 | $7700.00 | Window Closed / Lapsed |