Patent US2913575A successfully refreshed from Google Patents.
US2913575A
Expired / Lapsed
US
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Controlled brightness luminous panel luminaire
Assignee: Individual
•
Filing: 1955-06-27
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Granted: 1959-11-17
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Expires: 1975-06-27
Abstract
No abstract record available.
Inventors
- 👤 Willis L Lipscomb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:39
CPC Classifications
F; F21; F21S; F21S8/00; F21S8/02; F21Y; F21Y2103/00; F21Y2113/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1763963A
Cited
US1814339A
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US1941079A
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US2259151A
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US2331774A
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US2348930A
Cited
US2659811A
Cited
US2640149A
Cited
US2643328A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-16 | 1963-05-18 | 1963-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-16 | 1967-05-18 | 1967-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-16 | 1971-05-18 | 1971-11-17 | $7700.00 | Window Closed / Lapsed |