US2728319A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sectional floating dry dock
Assignee: Frederic R Harris Inc
•
Filing: 1952-04-11
•
Granted: 1955-12-27
•
Expires: 1972-04-11
Abstract
No abstract record available.
Inventors
- 👤 Gunnar C Engstrand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:52
CPC Classifications
B; B63; B63C; B63C1/00; B63C1/02; B63C1/04
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US601554A
Cited
US820974A
Cited
US1019611A
Cited
US1279084A
Cited
US1852493A
Cited
US2379904A
Cited
US2480144A
Cited
US2605733A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-12-26 | 1959-06-27 | 1959-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-26 | 1963-06-27 | 1963-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-26 | 1967-06-27 | 1967-12-27 | $7700.00 | Window Closed / Lapsed |