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Patent US2870857A successfully refreshed from Google Patents.
US2870857A
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Translucent acoustical correction ceiling construction
Assignee: Celotex Corp
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Filing: 1956-03-06
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Granted: 1959-01-27
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Expires: 1976-03-06
Abstract
No abstract record available.
Inventors
- 👤 Eugene E Goldstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:33
CPC Classifications
E; E04; E04B; E04B9/00; E04B9/32; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1729135A
Cited
US2352305A
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US2419971A
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US2608500A
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US2700537A
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US2710335A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-26 | 1962-07-28 | 1963-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-26 | 1966-07-28 | 1967-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-26 | 1970-07-28 | 1971-01-27 | $7700.00 | Window Closed / Lapsed |