Patent US2998545A successfully refreshed from Google Patents.
US2998545A
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Navigation light changer having lamp current monitor
Assignee: National Research Council Canada
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Filing: 1958-05-26
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Granted: 1961-08-29
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Expires: 1978-05-26
Abstract
No abstract record available.
Inventors
- 👤 Smyth Henry Lyall Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:34
CPC Classifications
H; H05; H05B; H05B39/00; H05B39/10; H05B39/105; B; B63; B63B; B63B45/00; B63B45/02; G; G08; G08G; G08G3/00; H05B39/09; B63B2045/005; B63B2201/00; B63B2201/04; B63B2201/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2054013A
Cited
US2195374A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |