US2797313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio communication by neutral frequency deviation
Assignee: Hoffman Electronics Corp
•
Filing: 1951-03-27
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Granted: 1957-06-25
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Expires: 1971-03-27
Abstract
No abstract record available.
Inventors
- 👤 Wasmansdorff Carlton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:50
CPC Classifications
H; H04; H04L; H04L27/00; H04L27/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1874978A
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US2185192A
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US2299388A
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US2427363A
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US2548814A
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US2456992A
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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) | 1960-06-24 | 1960-12-24 | 1961-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-24 | 1964-12-24 | 1965-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-24 | 1968-12-24 | 1969-06-25 | $7700.00 | Window Closed / Lapsed |