Patent US3566568A successfully refreshed from Google Patents.
US3566568A
Expired / Lapsed
US
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Cellular blocks with cover of sheet material
Assignee: PHOENIXVILLE LUMBER CO
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Filing: 1969-04-28
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Granted: 1971-03-02
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Expires: 1989-04-28
Abstract
Abstract A BUILDING CONSTRUCTION IS SHOWN HAVING BLOCKS FOR VERTICAL ASSEMBLY TO PROVIDE A WALL, THE BLOCKS HAVING FACINGS OR COVERS HELD ONTO THE BLOCKS BY FLANGES ENGAGED IN LONGTUDINAL GROOVES IN THE TOP AND BOTTOM OF THE BLOCKS AND WITH KEYS ENGAGING THE FLANGES. THE BLOCKS ARE OF LIGHT WEIGHT SYNTHETIC PLASTIC MATERIAL AND THE FACINGS OR COVERS ARE OF SYNTHETIC PLASTIC SHEET MATERIAL. THE BLOCKS HAVE COMMUNICATING OPENINGS FOR INSERTION OF REINFORCING RODS AND FOR THE POURING OF CONCRETE THEREIN TO STRENGTHEN AND RETAIN THE BLOCKS IN ASSEMBLED RELATION.
Inventors
- 👤 Joseph Slobodian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:08
CPC Classifications
E; E04; E04C; E04C1/00; E04C1/40; E04C1/41; E04B; E04B2/00; E04B2/02; E04B2/14; E04B2/24; E04B2002/0202; E04B2002/0204; E04B2002/0208
Claims Analysis
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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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |