US2884512A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Overhead lighting and room conditioning system
Assignee: WAKEFIELD Co
•
Filing: 1953-10-30
•
Granted: 1959-04-28
•
Expires: 1973-10-30
Abstract
No abstract record available.
Inventors
- 👤 George P Wakefield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:17
CPC Classifications
F; F21; F21V; F21V33/00; F21V33/0088
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2188527A
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US2264110A
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US2447694A
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US2440603A
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US2542114A
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US2480427A
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US2680502A
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US2691720A
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US2698071A
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US2684498A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-27 | 1962-10-27 | 1963-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-27 | 1966-10-27 | 1967-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-27 | 1970-10-27 | 1971-04-28 | $7700.00 | Window Closed / Lapsed |