Patent US2496148A successfully refreshed from Google Patents.
US2496148A
Expired / Lapsed
US
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Frequency modulator and time division multiplex system
Assignee: Melpar Inc
•
Filing: 1948-09-29
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Granted: 1950-01-31
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Expires: 1968-09-29
Abstract
No abstract record available.
Inventors
- 👤 Robert S Butts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:31
CPC Classifications
G; G08; G08C; G08C15/00; G08C15/06; G08C15/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1778827A
Cited
US1849827A
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US2085418A
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US2238249A
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US2321269A
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US2361658A
Cited
US2459557A
Cited
US2444950A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-01-30 | 1953-08-01 | 1954-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-01-30 | 1957-08-01 | 1958-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-01-30 | 1961-08-01 | 1962-01-31 | $7700.00 | Window Closed / Lapsed |