US2703544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deep-sea anchor
Assignee: Individual
•
Filing: 1952-07-11
•
Granted: 1955-03-08
•
Expires: 1972-07-11
Abstract
No abstract record available.
Inventors
- 👤 William M Ewing
- 👤 John L Worzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 17:06
CPC Classifications
B; B63; B63B; B63B21/00; B63B21/24; B63B21/26
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US744421A
Cited
US814229A
Cited
US1427560A
Cited
US1731785A
Cited
US1758911A
Cited
US2170889A
Cited
US2490460A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-03-07 | 1958-09-06 | 1959-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-03-07 | 1962-09-06 | 1963-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-03-07 | 1966-09-06 | 1967-03-08 | $7700.00 | Window Closed / Lapsed |