US2719955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transmission system
Assignee: Allen B du Mont Laboratories Inc
•
Filing: 1952-01-02
•
Granted: 1955-10-04
•
Expires: 1972-01-02
Abstract
No abstract record available.
Inventors
- 👤 Roger D Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:15
CPC Classifications
H; H04; H04J; H04J1/00; H04J1/02; H04J1/04; H04J1/045
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1759952A
Cited
US1956121A
Cited
US1902031A
Cited
US2110046A
Cited
US2243221A
Cited
US2455959A
Cited
US2236134A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-10-03 | 1959-04-04 | 1959-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-10-03 | 1963-04-04 | 1963-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-10-03 | 1967-04-04 | 1967-10-04 | $7700.00 | Window Closed / Lapsed |