Patent US1599579A successfully refreshed from Google Patents.
US2928040A
Expired / Lapsed
US
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Sweep generating circuits for cathode ray oscillographs
Assignee: LAND AIR Inc
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Filing: 1956-11-23
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Granted: 1960-03-08
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Expires: 1976-11-23
Abstract
No abstract record available.
Inventors
- 👤 Warren W Welcome
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:46
CPC Classifications
G; G01; G01R; G01R13/00; G01R13/20; G01R13/22; G01R13/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2085940A
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US2410721A
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US2430154A
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US2414486A
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US2645751A
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GB740087A
Cited
US2785215A
Cited
US2717942A
Cited
US2778988A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-03-08 | 1963-09-07 | 1964-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-08 | 1967-09-07 | 1968-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-08 | 1971-09-07 | 1972-03-08 | $7700.00 | Window Closed / Lapsed |