US2590685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prestressed concrete structure
Assignee: Individual
•
Filing: 1947-12-04
•
Granted: 1952-03-25
•
Expires: 1967-12-04
Abstract
No abstract record available.
Inventors
- 👤 Coff Leo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:05
CPC Classifications
E; E01; E01C; E01C7/00; E01C7/08; E01C7/10; E01C7/14; E01C7/16; B; B28; B28B; B28B23/00; B28B23/02; B28B23/04; B28B23/046
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1684663A
Cited
US1650554A
Cited
US1818254A
Cited
US2155121A
Cited
US2329670A
Cited
US2323848A
Cited
US2315634A
Cited
US2329189A
Cited
GB557025A
Cited
US2425079A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-25 | 1955-09-24 | 1956-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-25 | 1959-09-24 | 1960-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-25 | 1963-09-24 | 1964-03-25 | $7700.00 | Window Closed / Lapsed |