Patent US3561178A successfully refreshed from Google Patents.
US3561178A
Expired / Lapsed
US
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Bridge supporting structure having reinforced concrete elements formed along a catenary line
Assignee: Walter Bau AG
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Filing: 1968-10-29
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Granted: 1971-02-09
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Expires: 1988-10-29
Abstract
Abstract A MULTI-SECTION BRIDGE SUPPORTING STRUCTURE HAVING REINFORCED STEEL CONCRETE ELEMENTS EXTENDING ALONG A CATENARY LINE AND WHICH ARE DISPOSED BETWEEN A PAIR OF ABUTMENTS OR INTERMEDIATE COLUMNS AND WHOSE REINFORCING MATERIALS ARE ANCHORED THEREIN, WHERE THE STEEL CONCRETE SUPPORTING ELEMENTS CONSTITUTE THE SUPPORTING CONSTRUCTION FOR A TORSION RESISTING BOX GIRDER ANCHORED IN THE ABUTMENTS WHICH IS OF SUBSTANTIALLY CONSTANT STRUCTURAL HEIGHT AND WHICH CARRIES THE RUNWAY.
Inventors
- 👤 Ulrich Finsterwalder
- 👤 Klemens Finsterwalder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:02
CPC Classifications
E; E01; E01D; E01D11/00; E01D2/00; E01D2/04; E01D2101/00; E01D2101/20; E01D2101/24; E01D2101/26; E01D2101/28
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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |