US3561185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Armoring and stressing rod for concrete
Assignee: Walter Bau AG
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Filing: 1968-09-06
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Granted: 1971-02-09
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Expires: 1988-09-06
Abstract
Abstract ARMORING THE STRESSING ROD FOR REINFORCED AND PRESTRESSED CONCRETE WHICH HAS AN INTERRUPED HELICAL THREAD CONFIGUARTION WITH THREAD SEGMENTS EXTENDING ON OPPOSITE SIDES OF THE ROD SURFACE TO FULL HEIGHT ONLY OVER ONE-THIRD OF THE ROD CIRCUMFERENCE AND WITH THEIR ENDS MERGING WITH THE SURFACE OF THE ROD.
Inventors
- 👤 Ulrich Finsterwalder
- 👤 Georg Kern
- 👤 Ernst Bock
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:57
CPC Classifications
E; E04; E04C; E04C5/00; E04C5/01; E04C5/02; E04C5/03
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 |