US3412516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ceiling of plural sheets with interengaging flanges fitting in beam recesses
Assignee: Individual
•
Filing: 1965-11-29
•
Granted: 1968-11-26
•
Expires: 1985-11-29
Abstract
No abstract record available.
Inventors
- 👤 Lindstrom Olov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:28
CPC Classifications
E; E04; E04B; E04B9/00; E04B9/34; E04B9/36; E04B9/363
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US745000A
Cited
US1475387A
Cited
US2100957A
Cited
US2180317A
Cited
US2642968A
Cited
FR1204924A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-26 | 1972-05-27 | 1972-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-26 | 1976-05-27 | 1976-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-26 | 1980-05-27 | 1980-11-26 | $7700.00 | Window Closed / Lapsed |