US2698899A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit arrangement for receiving and demodulating frequency-modulated oscillations
Assignee: Hartford National Bank and Trust Co
•
Filing: 1949-11-30
•
Granted: 1955-01-04
•
Expires: 1969-11-30
Abstract
No abstract record available.
Inventors
- 👤 Boelens Willem Wigger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:24
CPC Classifications
H; H03; H03G; H03G11/00; H03G11/06
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2264724A
Cited
US2285957A
Cited
US2353468A
Cited
US2472301A
Cited
US2420249A
Cited
US2483195A
Cited
US2539818A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1958-01-03 | 1958-07-05 | 1959-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-01-03 | 1962-07-05 | 1963-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-01-03 | 1966-07-05 | 1967-01-04 | $7700.00 | Window Closed / Lapsed |