Patent US2554534A successfully refreshed from Google Patents.
US2554534A
Expired / Lapsed
US
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Control device
Assignee: Duracell Inc USA
•
Filing: 1946-06-15
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Granted: 1951-05-29
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Expires: 1966-06-15
Abstract
No abstract record available.
Inventors
- 👤 John R Long
- 👤 Emerson L Stroh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:41
CPC Classifications
H; H05; H05B; H05B1/00; H05B1/02; H05B1/0202; H05B1/0208
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US777046A
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US1205434A
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US1102566A
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US1492450A
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US1523096A
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US1819588A
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US1927934A
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US2060836A
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US2172189A
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US2285677A
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US2275917A
Cited
US2425030A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-28 | 1954-11-27 | 1955-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-28 | 1958-11-27 | 1959-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-28 | 1962-11-27 | 1963-05-29 | $7700.00 | Window Closed / Lapsed |