Patent US2887568A successfully refreshed from Google Patents.
US2887568A
Expired / Lapsed
US
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Ceiling luminaire
Assignee: Holophane Corp
•
Filing: 1957-02-26
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Granted: 1959-05-19
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Expires: 1977-02-26
Abstract
No abstract record available.
Inventors
- 👤 Franck Kurt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:49
CPC Classifications
F; F21; F21V; F21V5/00; F21V5/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1682490A
Cited
US2158653A
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US2244737A
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US2269554A
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US2280160A
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US2623160A
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US2756326A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-18 | 1962-11-17 | 1963-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-18 | 1966-11-17 | 1967-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-18 | 1970-11-17 | 1971-05-19 | $7700.00 | Window Closed / Lapsed |