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US2718290A
Expired / Lapsed
US
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Safety drop-out means for ceiling panels
Assignee: Individual
•
Filing: 1953-03-16
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Granted: 1955-09-20
•
Expires: 1973-03-16
Abstract
No abstract record available.
Inventors
- 👤 Lcon J Segil
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 18:04
CPC Classifications
E; E04; E04B; E04B9/00; E04B9/32; E04B9/22; E04B9/24; E04B9/241; Y; Y10; Y10S; Y10S52/00; Y10S52/05
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1315353A
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US1277794A
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US1151289A
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US1465452A
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US2126499A
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US2150344A
Cited
US2189159A
Cited
US2376715A
Cited
US2580540A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-09-19 | 1959-03-21 | 1959-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-09-19 | 1963-03-21 | 1963-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-09-19 | 1967-03-21 | 1967-09-20 | $7700.00 | Window Closed / Lapsed |