Patent NL42699C successfully refreshed from Google Patents.
Patent US3570207A successfully refreshed from Google Patents.
US3570207A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of advancing bridging structures made from prestressed concrete
Assignee: Individual
•
Filing: 1969-07-10
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Granted: 1971-03-16
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Expires: 1989-07-10
Abstract
Abstract IN THE CONSTRUCTION OF A BRIDGING ASSEMBLY WHICH WILL REST ON ABUTMENT PIERS AND INTERMEDIATE PIERS, BRIDGING SECTION ARE COUPLED TOGETHER SEQUENTIALLY AND THE COUPLED SECTIONS ARE ADVANCED AS A NEW SECTION IS ADDED, JOINTS BETWEEN THE SECTIONS BEING TEMPORARILY PRESTRESSED AT AS- SEMBLY AND THIS PRESTRESSING BEING REMOVED AFTER THE ASSEMBLY OF SECTIONS IS IN FINAL POSITION AND FINAL PRESTESSING HAS BEEN INSTALLED.
Inventors
- 👤 Pierre Launay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:57
CPC Classifications
E; E01; E01D; E01D21/00; E01D21/06; E01D21/065; E01D19/00; E01D19/04; E01D19/048
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) | 1974-03-15 | 1974-09-14 | 1975-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-15 | 1978-09-14 | 1979-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-15 | 1982-09-14 | 1983-03-16 | $7700.00 | Window Closed / Lapsed |