US2576928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Floating dry dock
Assignee: Frederic R Harris Inc
•
Filing: 1949-11-26
•
Granted: 1951-12-04
•
Expires: 1969-11-26
Abstract
No abstract record available.
Inventors
- 👤 Gunnar C Engstrand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:26
CPC Classifications
B; B63; B63B; B63B1/00; B63B1/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US601554A
Cited
US1671037A
Cited
US755854A
Cited
FR343634A
Cited
US853328A
Cited
AT36644B
Cited
US1267956A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-03 | 1955-06-04 | 1955-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-03 | 1959-06-04 | 1959-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-03 | 1963-06-04 | 1963-12-04 | $7700.00 | Window Closed / Lapsed |