US2786349A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prestressed concrete building
Assignee: Individual
•
Filing: 1951-01-16
•
Granted: 1957-03-26
•
Expires: 1971-01-16
Abstract
No abstract record available.
Inventors
- 👤 Coff Leo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:17
CPC Classifications
E; E04; E04B; E04B1/00; E04B1/18; E04B1/20; E04B1/22; E04B1/02; E04B1/04; E04B1/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US903909A
Cited
US1693941A
Cited
US1516074A
Cited
US1794425A
Cited
US1867185A
Cited
GB386176A
Cited
US2155121A
Cited
US2241169A
Cited
US2413990A
Cited
GB639399A
Cited
US2590685A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-03-25 | 1960-09-24 | 1961-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-03-25 | 1964-09-24 | 1965-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-03-25 | 1968-09-24 | 1969-03-26 | $7700.00 | Window Closed / Lapsed |