Patent US2943367A successfully refreshed from Google Patents.
US2943367A
Expired / Lapsed
US
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Ceiling structure
Assignee: University of Illinois at Urbana-Champaign
•
Filing: 1955-12-02
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Granted: 1960-07-05
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Expires: 1975-12-02
Abstract
No abstract record available.
Inventors
- 👤 Herbert K Wong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:39
CPC Classifications
E; E04; E04B; E04B9/00; E04B9/003
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1707008A
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US2009512A
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US1978632A
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US1997580A
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US1975002A
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US2027004A
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US2157316A
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US2569941A
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US2728595A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-07-05 | 1964-01-04 | 1964-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-05 | 1968-01-04 | 1968-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-05 | 1972-01-04 | 1972-07-05 | $7700.00 | Window Closed / Lapsed |