Patent US2662991A successfully refreshed from Google Patents.
US2662991A
Expired / Lapsed
US
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Arc lamp regulating device
Assignee: Individual
•
Filing: 1949-12-29
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Granted: 1953-12-15
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Expires: 1969-12-29
Abstract
No abstract record available.
Inventors
- 👤 Gretener Edgar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:24
CPC Classifications
H; H05; H05B; H05B31/00; H05B31/0081
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1078913A
Cited
US2150014A
Cited
US2107148A
Cited
US2160490A
Cited
US2136670A
Cited
CH240541A
Cited
US2469664A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-12-14 | 1957-06-15 | 1957-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-14 | 1961-06-15 | 1961-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-14 | 1965-06-15 | 1965-12-15 | $7700.00 | Window Closed / Lapsed |