US3428810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modulation and demodulation of high-frequency radiation
Assignee: Individual
•
Filing: 1965-01-27
•
Granted: 1969-02-18
•
Expires: 1985-01-27
Abstract
No abstract record available.
Inventors
- 👤 Karl F Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 00:57
CPC Classifications
H; H04; H04B; H04B10/00; H04B10/50; H04B10/501; H04B10/503; H04B10/505; H04B10/516; H04B10/548
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2530081A
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US2557038A
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US3055258A
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US2762871A
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US3134840A
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US3175088A
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US3196274A
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US3187251A
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US3310677A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-02-18 | 1972-08-19 | 1973-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-02-18 | 1976-08-19 | 1977-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-02-18 | 1980-08-19 | 1981-02-18 | $7700.00 | Window Closed / Lapsed |