US2388530A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power line signaling system
Assignee: RCA Corp
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Filing: 1942-04-01
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Granted: 1945-11-06
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Expires: 1962-04-01
Abstract
No abstract record available.
Inventors
- 👤 Harmon B Deal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:19
CPC Classifications
H; H02; H02J; H02J13/00; H02J13/13; H02J13/1311; H02J13/1315; H02J13/1313; Y; Y02; Y02B; Y02B90/00; Y02B90/20; Y02E; Y02E60/00; Y04; Y04S; Y04S10/00; Y04S10/50; Y04S10/52; Y04S40/00; Y04S40/12; Y04S40/121
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1948-11-05 | 1949-05-07 | 1949-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1952-11-05 | 1953-05-07 | 1953-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1956-11-05 | 1957-05-07 | 1957-11-06 | $7700.00 | Window Closed / Lapsed |