Patent US2984323A successfully refreshed from Google Patents.
US2984323A
Expired / Lapsed
US
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Ceiling structure
Assignee: GEMA A G APPBAU und STANZEREI
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Filing: 1956-05-28
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Granted: 1961-05-16
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Expires: 1976-05-28
Abstract
No abstract record available.
Inventors
- 👤 Lehmann Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:10
CPC Classifications
E; E04; E04B; E04B9/00; E04B9/22; E04B9/06; E04B9/18; E04B9/183; F; F24; F24D; F24D3/00; F24D3/12; F24D3/16; F24D3/165; Y; Y02; Y02B; Y02B30/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2250411A
Cited
US2734126A
Cited
CH122351A
Cited
US2073036A
Cited
US2729431A
Cited
US2710175A
Cited
US2841255A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-05-15 | 1964-11-14 | 1965-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-15 | 1968-11-14 | 1969-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-15 | 1972-11-14 | 1973-05-16 | $7700.00 | Window Closed / Lapsed |