US3137971A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stressed concrete structures
Assignee: Cable Covers Ltd
•
Filing: 1960-07-11
•
Granted: 1964-06-23
•
Expires: 1980-07-11
Abstract
No abstract record available.
Inventors
- 👤 Rhodes Brian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:37
CPC Classifications
E; E04; E04C; E04C5/00; E04C5/08; E04C5/12; E04C5/122
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2603319A
Cited
FR14895E
Cited
US2525198A
Cited
US2686963A
Cited
US2781658A
Cited
US2755657A
Cited
US2763464A
Cited
GB775744A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |