Patent US2905807A successfully refreshed from Google Patents.
US2905807A
Expired / Lapsed
US
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Instrument dial illuminator
Assignee: EMI Group Ltd
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Filing: 1956-03-29
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Granted: 1959-09-22
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Expires: 1976-03-29
Abstract
No abstract record available.
Inventors
- 👤 Stevens Bertram
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:39
CPC Classifications
H; H04; H04M; H04M1/00; H04M1/02; H04M1/22; B; B60; B60Q; B60Q3/00; B60Q3/10; B60Q3/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1778186A
Cited
US1905471A
Cited
US2256670A
Cited
US2637802A
Cited
US2677045A
Cited
US2718636A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-21 | 1963-03-23 | 1963-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-21 | 1967-03-23 | 1967-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-21 | 1971-03-23 | 1971-09-22 | $7700.00 | Window Closed / Lapsed |