US3139998A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-unloading apparatus
Assignee: Domestic Film Products Corp
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Filing: 1962-10-09
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Granted: 1964-07-07
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Expires: 1982-10-09
Abstract
No abstract record available.
Inventors
- 👤 Norman R Seaman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:17
CPC Classifications
B; B61; B61D; B61D5/00; B61D5/002; B61D5/004
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
154 words
A SELF-UNLOADING APPARATUS FOR DISCHARGING GRANULAR MATERIAL FROM A COMPARTMENT HAVING A FLOOR, OPPOSED SIDE WALLS, AN END WALL EXTENDING UPWARDLY FROM SAID FLOOR BETWEEN THE SAID SIDE WALLS AND A DISCHARGE OPENING IN THE FLOOR SPACED INWARDLY OF SAID END WALL, COMPRISING AN INFLATABLE PRIMARY CHAMBER AND AN INFLATABLE SECONDARY CHAMBER, SAID PRIMARY CHAMBER HAVING A PILLOW-LIKE SHAPE WHEN INFLATED AND BEING POSITIONED IN SAID COMPARTMENT TO OVERLIE THE INTERSECTION OF SAID FLOOR AND SAID END WALL, MEANS FOR SECURING SAID PRIMARY CHAMBER TO SAID COMPARTMENT, SAID INFLATABLE SECONDARY CHAMBER POSITIONED TO OVERLIE SAID PRIMARY CHAMBER AND SAID FLOOR BETWEEN SAID DISCHARGE OPENING AND SAID END WALL, MEANS SECURING SAID SECONDARY CHAMBER TO SAID COMPARTMENT, AND MEANS TO SEQUENTIALLY INFLATE SAID PRIMARY CHAMBER AND THEN SAID SECONDARY CHAMBER TO LIFT THE GRANULAR MATERIAL ABOVE THE ANGLE OF REPOSE OF SAID MATERIAL TO CAUSE THE MATERIAL TO SLIDE TO AND OUT SAID DISCHARGE OPENING.
Claim 2
Dependent Claim
154 words
A SELF-UNLOADING APPARATUS FOR DISCHARGING GRANULAR MATERIAL FROM A COMPARTMENT HAVING A FLOOR, OPPOSED SIDE WALLS, AN END WALL EXTENDING UPWARDLY FROM SAID FLOOR BETWEEN THE SAID SIDE WALLS AND A DISCHARGE OPENING IN THE FLOOR SPACED INWARDLY OF SAID END WALL, COMPRISING AN INFLATABLE PRIMARY CHAMBER AND AN INFLATABLE SECONDARY CHAMBER, SAID PRIMARY CHAMBER HAVING A PILLOW-LIKE SHAPE WHEN INFLATED AND BEING POSITIONED IN SAID COMPARTMENT TO OVERLIE THE INTERSECTION OF SAID FLOOR AND SAID END WALL, MEANS FOR SECURING SAID PRIMARY CHAMBER TO SAID COMPARTMENT, SAID INFLATABLE SECONDARY CHAMBER POSITIONED TO OVERLIE SAID PRIMARY CHAMBER AND SAID FLOOR BETWEEN SAID DISCHARGE OPENING AND SAID END WALL, MEANS SECURING SAID SECONDARY CHAMBER TO SAID COMPARTMENT, AND MEANS TO SEQUENTIALLY INFLATE SAID PRIMARY CHAMBER AND THEN SAID SECONDARY CHAMBER TO LIFT THE GRANULAR MATERIAL ABOVE THE ANGLE OF REPOSE OF SAID MATERIAL TO CAUSE THE MATERIAL TO SLIDE TO AND OUT SAID DISCHARGE OPENING.
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) | 1967-07-07 | 1968-01-06 | 1968-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-07-07 | 1972-01-06 | 1972-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-07-07 | 1976-01-06 | 1976-07-07 | $7700.00 | Window Closed / Lapsed |