US2985787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric discharge lamps
Assignee: British Thomson Houston Co Ltd
•
Filing: 1959-11-17
•
Granted: 1961-05-23
•
Expires: 1979-11-17
Abstract
No abstract record available.
Inventors
- 👤 Scott William Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 06:08
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/02; H01J61/30; H01J61/305; H01J61/307; H01J61/32; H01J61/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2184241A
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US2317265A
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US2346522A
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US2406146A
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US2405518A
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US2457503A
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US2555749A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-22 | 1964-11-21 | 1965-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-22 | 1968-11-21 | 1969-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-22 | 1972-11-21 | 1973-05-23 | $7700.00 | Window Closed / Lapsed |