Patent US2634334A successfully refreshed from Google Patents.
US2634334A
Expired / Lapsed
US
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Carrier current communication system
Assignee: Individual
•
Filing: 1948-02-20
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Granted: 1953-04-07
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Expires: 1968-02-20
Abstract
No abstract record available.
Inventors
- 👤 Harry N Kalb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:14
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/54; H04B2203/00; H04B2203/54; H04B2203/5429; H04B2203/5437
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1673023A
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US1746808A
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US1705903A
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US2038202A
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US2279697A
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US2193973A
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US2300940A
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US2421333A
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US2577731A
Cited
US2336258A
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US2421727A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-04-06 | 1956-10-06 | 1957-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-04-06 | 1960-10-06 | 1961-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-04-06 | 1964-10-06 | 1965-04-07 | $7700.00 | Window Closed / Lapsed |