US3407554A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prestressed, segmented concrete beam
Assignee: Individual
•
Filing: 1965-06-03
•
Granted: 1968-10-29
•
Expires: 1985-06-03
Abstract
No abstract record available.
Inventors
- 👤 James M Young
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:20
CPC Classifications
E; E04; E04C; E04C3/00; E04C3/02; E04C3/20; E04C3/22; E04G; E04G21/00; E04G21/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US9172A
Cited
US2340263A
Cited
US2413990A
Cited
FR1000107A
Cited
US2769332A
Cited
US3167882A
Cited
US3172932A
Cited
US3283457A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-29 | 1972-04-29 | 1972-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-29 | 1976-04-29 | 1976-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-29 | 1980-04-29 | 1980-10-29 | $7700.00 | Window Closed / Lapsed |