US2507074A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lighting fixture for circular fluorescent and incandescent lamps
Assignee: Individual
•
Filing: 1945-04-23
•
Granted: 1950-05-09
•
Expires: 1965-04-23
Abstract
No abstract record available.
Inventors
- 👤 Arthur E Wiedenhoeft
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:39
CPC Classifications
F; F21; F21S; F21S6/00; F21S6/005; F21W; F21W2121/00; F21Y; F21Y2103/00; F21Y2103/30; F21Y2103/33; F21Y2113/00; F21Y2113/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB355175A
Cited
US2264253A
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US2265644A
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US2219541A
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US2339166A
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US2366252A
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US2298961A
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US2288941A
Cited
US2350462A
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US2406896A
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US2435715A
Cited
US2419965A
Cited
US2392785A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-05-08 | 1953-11-07 | 1954-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-05-08 | 1957-11-07 | 1958-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-05-08 | 1961-11-07 | 1962-05-09 | $7700.00 | Window Closed / Lapsed |