Patent US2528020A successfully refreshed from Google Patents.
US2528020A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mask controlled feedback system for cathode-ray tubes
Assignee: Lanteris Space LLC
•
Filing: 1945-07-24
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Granted: 1950-10-31
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Expires: 1965-07-24
Abstract
No abstract record available.
Inventors
- 👤 David E Sunstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:11
CPC Classifications
G; G06; G06K; G06K11/00; G06K11/02; Y; Y10; Y10S; Y10S84/00; Y10S84/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1882849A
Cited
GB328680A
Cited
US2096985A
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US1976298A
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US2144337A
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US2224677A
Cited
US2243600A
Cited
US2357922A
Cited
US2446945A
Cited
US2404106A
Cited
US2462263A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-30 | 1954-05-01 | 1954-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-30 | 1958-05-01 | 1958-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-30 | 1962-05-01 | 1962-10-31 | $7700.00 | Window Closed / Lapsed |