US2907875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Emergency radio transmitter
Assignee: Individual
•
Filing: 1957-09-26
•
Granted: 1959-10-06
•
Expires: 1977-09-26
Abstract
No abstract record available.
Inventors
- 👤 Frank G Seyfang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:06
CPC Classifications
B; B63; B63B; B63B22/00; B63B22/003; H; H01; H01Q; H01Q1/00; H01Q1/12; H01Q1/1235; H04; H04B; H04B1/00; H04B1/02; H04B1/03; H04B1/034
Claims Analysis
Total Claims: 0
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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) | 1962-10-05 | 1963-04-06 | 1963-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-05 | 1967-04-06 | 1967-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-05 | 1971-04-06 | 1971-10-06 | $7700.00 | Window Closed / Lapsed |