US3563408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sidewall for a prismatic container
Assignee: Inland Steel Co
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Filing: 1968-11-22
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Granted: 1971-02-16
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Expires: 1988-11-22
Abstract
Abstract A sidewall for a prismatic shipping container is disclosed in which radially expandable die segments are used to engage a cylindrical blank of sheet material and thereby form straight axial side edges and convex connecting end edges to define flat prismatic side surfaces.
Inventors
- 👤 Leonardus Arnoldus Nic Bijvoet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:02
CPC Classifications
B; B65; B65D; B65D7/00; B65D7/02; B21; B21D; B21D51/00; B21D51/16; B21D51/26; B21D51/2646; Y; Y10; Y10S; Y10S220/00; Y10S220/906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A prismatic container sidewall made of sheet material defining inner and outer surfaces and having a central portion with a cross section substantially in the shape of a regular polygon, two extremities having a substantially circular cross section of a diameter not larger than the diameter of the inscribed circle of said polygon, and two transition portions connecting said extremities to said central portion, said prismatic central portion inner and outer surfaces comprising a plurality of flat prismatic surfaces having substantially parallel straight axial edges connected at each end by convex connecting edges such that the length along the central axis of the flat surfaces thus formed is substantially longer than along adjacent axial edges.
Claim 2
Dependent Claim
115 words
A prismatic container sidewall made of sheet material defining inner and outer surfaces and having a central portion with a cross section substantially in the shape of a regular polygon, two extremities having a substantially circular cross section of a diameter not larger than the diameter of the inscribed circle of said polygon, and two transition portions connecting said extremities to said central portion, said prismatic central portion inner and outer surfaces comprising a plurality of flat prismatic surfaces having substantially parallel straight axial edges connected at each end by convex connecting edges such that the length along the central axis of the flat surfaces thus formed is substantially longer than along adjacent axial edges.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-15 | 1974-08-17 | 1975-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-15 | 1978-08-17 | 1979-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-15 | 1982-08-17 | 1983-02-16 | $7700.00 | Window Closed / Lapsed |