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Patent US1214283A successfully refreshed from Google Patents.
US1214283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wireless telegraphy.
Assignee: Federal Telegraph Co
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Filing: 1912-09-24
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Granted: 1917-01-30
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Expires: 1932-09-24
Abstract
No abstract record available.
Inventors
- 👤 Lee De Forest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:00
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/52; H01Q1/526
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1920-01-30 | 1920-07-31 | 1921-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1924-01-30 | 1924-07-31 | 1925-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1928-01-30 | 1928-07-31 | 1929-01-30 | $7700.00 | Window Closed / Lapsed |