US2930849A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Telegraph repeater system
Assignee: STELMA Inc
•
Filing: 1956-11-13
•
Granted: 1960-03-29
•
Expires: 1976-11-13
Abstract
No abstract record available.
Inventors
- 👤 Lawrence M Carver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:48
CPC Classifications
H; H04; H04L; H04L25/00; H04L25/02; H04L25/0264; H04L25/0266; H04L25/0268
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1428156A
Cited
US1665698A
Cited
US1960569A
Cited
US2096841A
Cited
US2518027A
Cited
US2762863A
Cited
US2757237A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-29 | 1963-09-28 | 1964-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-29 | 1967-09-28 | 1968-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-29 | 1971-09-28 | 1972-03-29 | $7700.00 | Window Closed / Lapsed |