US2497852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmitter buoy
Assignee: Individual
•
Filing: 1945-03-01
•
Granted: 1950-02-21
•
Expires: 1965-03-01
Abstract
No abstract record available.
Inventors
- 👤 Gilbert H Arenstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:22
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/27; H01Q1/34; B; B63; B63C; B63C9/00; B63C9/21; H04; H04B; H04B1/00; H04B1/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US740317A
Cited
US1485776A
Cited
US1417692A
Cited
US1503380A
Cited
US2115744A
Cited
US2281284A
Cited
US2293949A
Cited
US2310017A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-02-20 | 1953-08-22 | 1954-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-02-20 | 1957-08-22 | 1958-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-02-20 | 1961-08-22 | 1962-02-21 | $7700.00 | Window Closed / Lapsed |