Patent US4815833A successfully refreshed from Google Patents.
Patent US2591660A successfully refreshed from Google Patents.
US2591660A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized electrical synchronizing system
Assignee: RADIO TELEVISION INST Inc
•
Filing: 1947-11-08
•
Granted: 1952-04-01
•
Expires: 1967-11-08
Abstract
No abstract record available.
Inventors
- 👤 Frederick A Lindley
- 👤 Frederick M Arbuckle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 03:25
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/04; H04N5/12; H04N5/123; H03; H03K; H03K3/00; H03K3/02; H03K3/04; H03K3/16
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2196845A
Cited
US2250284A
Cited
US2277000A
Cited
US2389025A
Cited
US2466782A
Cited
US2424905A
Cited
US2448070A
Cited
US2445933A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-01 | 1955-10-01 | 1956-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-01 | 1959-10-01 | 1960-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-01 | 1963-10-01 | 1964-04-01 | $7700.00 | Window Closed / Lapsed |