Patent US2974249A successfully refreshed from Google Patents.
US2974249A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Xenon short arc lamps
Assignee: Duro Test Corp
•
Filing: 1958-01-28
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Granted: 1961-03-07
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Expires: 1978-01-28
Abstract
No abstract record available.
Inventors
- 👤 Wolfgang E Thouret
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:47
CPC Classifications
H; H01; H01J; H01J61/00; H01J61/84; H01J61/86; H01J61/02; H01J61/025
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2733373A
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US1800926A
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US2038825A
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US2212881A
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US2241968A
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US2538561A
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US2459516A
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US2440832A
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US2697183A
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US2843801A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-06 | 1964-09-05 | 1965-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-06 | 1968-09-05 | 1969-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-06 | 1972-09-05 | 1973-03-07 | $7700.00 | Window Closed / Lapsed |