US2854565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Luminous sound absorbing ceiling
Assignee: A L SMITH IRON Co
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Filing: 1956-02-16
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Granted: 1958-09-30
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Expires: 1976-02-16
Abstract
No abstract record available.
Inventors
- 👤 Kruger Michael Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:45
CPC Classifications
E; E04; E04B; E04B9/00; E04B9/32; F; F21; F21V; F21V33/00; F21Y; F21Y2103/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-29 | 1962-03-31 | 1962-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-29 | 1966-03-31 | 1966-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-29 | 1970-03-31 | 1970-09-30 | $7700.00 | Window Closed / Lapsed |