US2602839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit for oscillograph with provision for calibrating during operation
Assignee: Individual
•
Filing: 1950-05-09
•
Granted: 1952-07-08
•
Expires: 1970-05-09
Abstract
No abstract record available.
Inventors
- 👤 Ellis Greer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:17
CPC Classifications
G; G01; G01R; G01R13/00; G01R13/20; G01R13/22; G01R13/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2186006A
Cited
US2439050A
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US2567575A
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US2471530A
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US2466746A
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US2548276A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-08 | 1956-01-07 | 1956-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-08 | 1960-01-07 | 1960-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-08 | 1964-01-07 | 1964-07-08 | $7700.00 | Window Closed / Lapsed |