US3454255A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bulkhead construction for concrete structures having continuous reinforcements
Assignee: ANDREW A ARQUILLA
•
Filing: 1965-09-27
•
Granted: 1969-07-08
•
Expires: 1985-09-27
Abstract
No abstract record available.
Inventors
- 👤 Andrew A Arquilla
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 02:45
CPC Classifications
E; E04; E04G; E04G21/00; E04G21/12; E04G21/125; E04G11/00; E04G11/36; E04G11/365
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-07 | 1973-01-06 | 1973-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-07 | 1977-01-06 | 1977-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-07 | 1981-01-06 | 1981-07-08 | $7700.00 | Window Closed / Lapsed |