Patent FR2297640A1 successfully refreshed from Google Patents.
US2547598A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Subscription image transmission system and apparatus
Assignee: Zenith Electronics LLC
•
Filing: 1947-09-13
•
Granted: 1951-04-03
•
Expires: 1967-09-13
Abstract
No abstract record available.
Inventors
- 👤 Erwin M Roschke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:01
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/16; H04N7/167; H04N7/169; H04N7/1693
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1811102A
Cited
US1657366A
Cited
US1706378A
Cited
US1688451A
Cited
US1688453A
Cited
US1688452A
Cited
US1932253A
Cited
GB377175A
Cited
GB386649A
Cited
US2417847A
Cited
US2251525A
Cited
US2403059A
Cited
US2402058A
Cited
US2402067A
Cited
US2405252A
Cited
US2406811A
Cited
US2429787A
Cited
US2414101A
Cited
US2419568A
Cited
US2401405A
Cited
US2472774A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-02 | 1954-10-02 | 1955-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-02 | 1958-10-02 | 1959-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-02 | 1962-10-02 | 1963-04-03 | $7700.00 | Window Closed / Lapsed |