US3456191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Level control system for a communication system of the type in which a pilot signal is cotransmitted with information signals between an initial station and a final station
Assignee: US Philips Corp
•
Filing: 1965-10-05
•
Granted: 1969-07-15
•
Expires: 1985-10-05
Abstract
No abstract record available.
Inventors
- 👤 Nicolaas Rodenburg
- 👤 Willem Hermes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:41
CPC Classifications
H; H04; H04B; H04B3/00; H04B3/02; H04B3/04; H04B3/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1438219A
Cited
US1642499A
Cited
US1734219A
Cited
US2300366A
Cited
US2522738A
Cited
GB630442A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-14 | 1973-01-13 | 1973-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-14 | 1977-01-13 | 1977-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-14 | 1981-01-13 | 1981-07-15 | $7700.00 | Window Closed / Lapsed |