US2531399A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Television projection system and viewing screen
Assignee: Farnsworth Research Corp
•
Filing: 1946-04-27
•
Granted: 1950-11-28
•
Expires: 1966-04-27
Abstract
No abstract record available.
Inventors
- 👤 Cawein Madison
- 👤 Hans W G Salinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:26
CPC Classifications
G; G03; G03B; G03B21/00; G03B21/54; G03B21/56; G03B21/60; G03B21/62; G03B21/625; H; H04; H04N; H04N5/00; H04N5/74
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB191124917A
Cited
US2018592A
Cited
US2028496A
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US2131974A
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US2229302A
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US2351294A
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US2307210A
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US2338654A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-11-27 | 1954-05-29 | 1954-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-27 | 1958-05-29 | 1958-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-27 | 1962-05-29 | 1962-11-28 | $7700.00 | Window Closed / Lapsed |