Patent US3486117A successfully refreshed from Google Patents.
US3486117A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio telegraph signal transmission
Assignee: POSTMASTER GENERAL UK
•
Filing: 1967-01-23
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Granted: 1969-12-23
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Expires: 1987-01-23
Abstract
No abstract record available.
Inventors
- 👤 Kenneth Groves
- 👤 Philip Neale Ridout
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:05
CPC Classifications
H; H04; H04L; H04L27/00; H04L27/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1999176A
Cited
US2179182A
Cited
US2278779A
Cited
US2362201A
Cited
US3051902A
Cited
US3213368A
Cited
US3348151A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-12-22 | 1973-06-23 | 1973-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-12-22 | 1977-06-23 | 1977-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-12-22 | 1981-06-23 | 1981-12-23 | $7700.00 | Window Closed / Lapsed |