US2768290A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telegraph phase shifting equipment
Assignee: RCA Corp
•
Filing: 1953-04-23
•
Granted: 1956-10-23
•
Expires: 1973-04-23
Abstract
No abstract record available.
Inventors
- 👤 Harris James Stallings
- 👤 Latimer Chester Willson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:24
CPC Classifications
H; H04; H04L; H04L7/00; H04L7/02; H04L7/033; H04L7/0331
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1802738A
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US2409474A
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US2475625A
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US2496994A
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US2477047A
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US2493058A
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US2626357A
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US2515195A
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US2589465A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-23 | 1960-04-23 | 1960-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-23 | 1964-04-23 | 1964-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-23 | 1968-04-23 | 1968-10-23 | $7700.00 | Window Closed / Lapsed |