Patent US3570206A successfully refreshed from Google Patents.
US3570206A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monolithic concrete slab construction
Assignee: Individual
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Filing: 1968-11-21
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Granted: 1971-03-16
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Expires: 1988-11-21
Abstract
Abstract A SLAB CONSTRUCTION FOR USE IN MULTISTORY BUILDINGS WHICH INCLUDES A PAIR OF SPACED SLABS BEING INTEGRALLY JOINED BY A PLURALITY OF VERTICALLY SPACED CYLINDRICAL MEMBERS. AN OMNI-DIRECTIONAL VOID IS PROVIDED BETWEEN THE SLAB MEMBERS FOR ACCOMMODATING ELECTRICAL WIRING, AIR CONDITIONING, PASSAGEWAYS, ETC. THE ENTIRE SLAB CONSTRUCTION IS POURED MONOLITHICALLY IN CONCRETE, SO AS TO INCREASE THE SHEAR STRENGTH OF THE CYLINDRICAL CONNECTORS.
Inventors
- 👤 John A Armistead
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:38
CPC Classifications
E; E04; E04C; E04C2/00; E04C2/30; E04C2/34; E04B; E04B5/00; E04B5/48; E04C2/44; E04C2/52; E04C2/521
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |