Patent US3727656A successfully refreshed from Google Patents.
US3727656A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grain storage
Assignee: Individual
•
Filing: 1970-09-15
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Granted: 1973-04-17
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Expires: 1990-09-15
Abstract
Abstract A grain or other discrete form material storage device formed from a foldable (flexible) synthetic plastics sheet material. The storage device has a base which would normally rest upon the ground and a peripheral side wall which tapers upwardly to an access opening at the apex of the wall. The wall is disposed at an angle to the base, when the device is charged with stored material, which is approximately equal to the normal angle of repose of the stored material.
Inventors
- 👤 D Luders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:00
CPC Classifications
B; B65; B65G; B65G3/00; B65G3/02; B65D; B65D88/00; B65D88/16; Y; Y10; Y10S; Y10S383/00; Y10S383/904; Y10S383/907
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
111 words
A storage device defined by a base, a side wall and a collar, all being formed of a flexible water impervious sheet material, the wall extending upwardly and inwardly from the base at an angle substantially equal to the normal angle of repose of a material to be stored in the device, when the material is so stored, the collar extending upwardly and inwardly from the wall at an angle with respect to the base which is greater than the normal angle or repose of the material, and an access opening extending through the collar at the apex of the device through which the material is delivered to charge the device.
Claim 2
Dependent Claim
111 words
A storage device defined by a base, a side wall and a collar, all being formed of a flexible water impervious sheet material, the wall extending upwardly and inwardly from the base at an angle substantially equal to the normal angle of repose of a material to be stored in the device, when the material is so stored, the collar extending upwardly and inwardly from the wall at an angle with respect to the base which is greater than the normal angle or repose of the material, and an access opening extending through the collar at the apex of the device through which the material is delivered to charge the device.
Claim 3
Dependent Claim
17 words
A storage device as claimed in claim 1 wherein the sheet material comprises a synthetic plastics material.
Claim 4
Dependent Claim
33 words
A storage device as claimed in claim 1 wherein the base is of square configuration, the side all comprises four interconnected triangular-shaped panels, and the wall has a truncated pyramidal shape when supported.
Claim 5
Dependent Claim
24 words
A storage device as claimed in claim 1 wherein the access opening is bordered by a neck formed of a flexible plastics sheet material.
Claim 6
Dependent Claim
45 words
A storage device as claimed in claim 1 wherein the side wall extends upwardly from the periphery of the base at an angle of approximately 27* and the collar wall is disposed at an angle of between 35* to 70* with respect to the base.
Claim 7
Dependent Claim
27 words
A storage device according to claim 4 in which the portion of the neck adjacent the collar has sides which extend vertically upward when charged with grain.
References Cited (Backward Citations)
US2730150A
Cited
US3105617A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |