Patent US954641A successfully refreshed from Google Patents.
US954641A
Expired / Lapsed
US
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Wireless telegraphy.
Assignee: Marconi Wireless Telegraph Co America
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Filing: 1909-05-15
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Granted: 1910-04-12
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Expires: 1929-05-15
Abstract
No abstract record available.
Inventors
- 👤 Guglielmo Marconi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:09
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/38; H04B1/40; H04B1/54; H04B1/56; H04W; H04W72/00; H04W72/04; H04W72/044; H04W72/0446
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) | 1913-04-11 | 1913-10-11 | 1914-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1917-04-11 | 1917-10-11 | 1918-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1921-04-11 | 1921-10-11 | 1922-04-12 | $7700.00 | Window Closed / Lapsed |