US3788934A
Expired / Lapsed
US
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Three-dimensional folded structure with curved surfaces
Assignee: Individual
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Filing: 1971-10-01
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Granted: 1974-01-29
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Expires: 1991-10-01
Abstract
Abstract A three-dimensional fold structure is formable in a polygonal cross-section form a sheet having a plurality of curved hinges which are undulating and non-crossing. The axes of the undulating hinge lines have a substantial component along the axis of the structure, and adjacent hinge lines in opposite directions.
Inventors
- 👤 A Coppa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:34
CPC Classifications
B; B21; B21D; B21D11/00; B21D11/08; A; A63; A63H; A63H33/00; A63H33/16; B21D11/20; B21D5/00; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24628; Y10T428/24669; Y10T428/24694
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) | 1977-01-28 | 1977-07-30 | 1978-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-28 | 1981-07-30 | 1982-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-28 | 1985-07-30 | 1986-01-29 | $7700.00 | Window Closed / Lapsed |