Patent US2820894A successfully refreshed from Google Patents.
US2820894A
Expired / Lapsed
US
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Television scanning system
Assignee: GTE Sylvania Inc
•
Filing: 1953-09-04
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Granted: 1958-01-21
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Expires: 1973-09-04
Abstract
No abstract record available.
Inventors
- 👤 Schrecongost Ray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:56
CPC Classifications
H; H03; H03K; H03K4/00; H03K4/06; H03K4/08; H03K4/10; H03K4/26; H03K4/39; H03K4/43
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2513722A
Cited
US2517715A
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US2559525A
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US2545346A
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US2562985A
Cited
US2662981A
Cited
US2752528A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |