Patent US3706627A successfully refreshed from Google Patents.
US3706627A
Expired / Lapsed
US
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Stress oriented corrugations
Assignee: Chicago Bridge and Iron Co
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Filing: 1971-06-07
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Granted: 1972-12-19
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Expires: 1991-06-07
Abstract
Abstract A sheet having a center section of alternating depending and extending frusto-conical elements and a one-way corrugations extending away from said center section to the edges of the sheet.
Inventors
- 👤 Christian Arne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:14
CPC Classifications
F; F17; F17C; F17C3/00; F17C3/02; F17C3/025; F17C3/027; B; B21; B21D; B21D13/00; B21D13/10; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24479; Y10T428/2457; Y10T428/24628; Y10T428/24669; Y10T428/24678; 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) | 1975-12-19 | 1976-06-19 | 1976-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-19 | 1980-06-19 | 1980-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-19 | 1984-06-19 | 1984-12-19 | $7700.00 | Window Closed / Lapsed |