US2688690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluorescent lighting unit
Assignee: PROGRESS Manufacturing Co Inc
•
Filing: 1950-04-07
•
Granted: 1954-09-07
•
Expires: 1970-04-07
Abstract
No abstract record available.
Inventors
- 👤 Lane David
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:33
CPC Classifications
F; F21; F21S; F21S8/00; F21S8/04; F21S8/03; F21S8/033; H; H01; H01R; H01R33/00; H01R33/05; H01R33/06; H01R33/08; F21Y; F21Y2103/00; F21Y2103/30; F21Y2103/33
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US966966A
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US1110910A
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US1718316A
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US2459647A
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US2456940A
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US2503931A
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US2437569A
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US2494058A
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US2525022A
Cited
US2506575A
Cited
US2605387A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-06 | 1958-03-08 | 1958-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-06 | 1962-03-08 | 1962-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-06 | 1966-03-08 | 1966-09-07 | $7700.00 | Window Closed / Lapsed |