Patent US2582957A successfully refreshed from Google Patents.
US2582957A
Expired / Lapsed
US
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Communication system
Assignee: Individual
•
Filing: 1945-11-26
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Granted: 1952-01-22
•
Expires: 1965-11-26
Abstract
No abstract record available.
Inventors
- 👤 Adolph W Borsum
- 👤 Wilhelm W Brockway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:35
CPC Classifications
H; H04; H04L; H04L5/00; H04L5/02; H04L5/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2110746A
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US2112824A
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US2256487A
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US2236374A
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US2176120A
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US2233275A
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US2363941A
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US2321971A
Cited
US2402973A
Cited
US2406858A
Cited
US2407336A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-01-21 | 1955-07-23 | 1956-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-01-21 | 1959-07-23 | 1960-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-01-21 | 1963-07-23 | 1964-01-22 | $7700.00 | Window Closed / Lapsed |