Patent US3669588A successfully refreshed from Google Patents.
US3669588A
Expired / Lapsed
US
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Apparatus for manufacturing construction elements
Assignee: EROS CAMPONOVO
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Filing: 1969-05-19
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Granted: 1972-06-13
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Expires: 1989-05-19
Abstract
Abstract APPARATUS FOR MANUFACTUING CONSTRUCTION ELEMENTS IN THE FORM OF PLATES OR PANELS OR THE LIKE, UTILIZING CEMENT CONGLOMERATE AND GRANULES OF INERT MATERIAL, COMPRISES A FRAME CARRYING A HOPPER AND A RECIPROACTING PLUNGER FOR COMPRESSING MATERIAL THAT EMERGES DOWNWARDLY FROM THE HOPPER. THE PLUNGER HAS A DOWNWARDLY FORWARDLY INCLINED LEADING EDGE, AND THE RESISTANCE OF THE COMPRESSED MATERIAL TO THE PLUNGER FORCES THE WHOLE REAWARDLY OVER THE SUPPORTING SURFACE INSTEAD OF FORCING THE COMPRESSED MATERIAL FORWARDLY. REINFORCING ELEMENTS CAN BE INTRODUCED INTO THE MATERIAL THROUGH A SLOT IN THE PLUNGER.
Inventors
- 👤 Fernando Cavalli
- 👤 Piero Cretti
- 👤 Morbio Superiore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:06
CPC Classifications
B; B28; B28B; B28B3/00; B28B3/20; B28B3/26; B28B3/2645; B28B3/24
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) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |