US2920143A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Redundancy reducing pulse communications system
Assignee: PORTUGUESA RADIO MAR Cia
•
Filing: 1956-05-16
•
Granted: 1960-01-05
•
Expires: 1976-05-16
Abstract
No abstract record available.
Inventors
- 👤 Filipowsky Richard Fried Josef
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:27
CPC Classifications
H; H04; H04J; H04J3/00; H04J3/16; H04J3/1682; H04B; H04B14/00; H04B14/02
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2098956A
Cited
US2272070A
Cited
US2271000A
Cited
US2388001A
Cited
US2541932A
Cited
US2559644A
Cited
US2676202A
Cited
US2664462A
Cited
US2810787A
Cited
US2803702A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-04 | 1963-07-06 | 1964-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-04 | 1967-07-06 | 1968-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-04 | 1971-07-06 | 1972-01-05 | $7700.00 | Window Closed / Lapsed |