US3425177A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fixed anchorage for concrete prestressing method with subsequent attachment
Assignee: MESSRS HEILMANN AND LITTMAN BAU AG
•
Filing: 1966-09-23
•
Granted: 1969-02-04
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Expires: 1986-09-23
Abstract
No abstract record available.
Inventors
- 👤 Karl Buyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:03
CPC Classifications
E; E04; E04C; E04C5/00; E04C5/08; E04C5/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2618147A
Cited
US2751660A
Cited
GB721517A
Cited
US2970406A
Cited
US2934935A
Cited
US3300922A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-04 | 1972-08-05 | 1973-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-04 | 1976-08-05 | 1977-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-04 | 1980-08-05 | 1981-02-04 | $7700.00 | Window Closed / Lapsed |