US2791152A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radar chart projection plotter and film picture projector apparatus
Assignee: General Patent Corp
•
Filing: 1954-07-09
•
Granted: 1957-05-07
•
Expires: 1974-07-09
Abstract
No abstract record available.
Inventors
- 👤 Lyndon A Durant
- 👤 Gustav G Ehrler
- 👤 Murphy Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:35
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/04; G03; G03B; G03B31/00; G03B31/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US494128A
Cited
GB157236A
Cited
DE362596C
Cited
US1242674A
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US1612800A
Cited
GB254301A
Cited
US1655306A
Cited
US2053073A
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US2090270A
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US2125553A
Cited
US2374981A
Cited
US2431612A
Cited
US2586743A
Cited
US2591139A
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FR1030402A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-05-06 | 1960-11-05 | 1961-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-05-06 | 1964-11-05 | 1965-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-05-06 | 1968-11-05 | 1969-05-07 | $7700.00 | Window Closed / Lapsed |