US2817815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transient signal recorder
Assignee: Individual
•
Filing: 1948-02-02
•
Granted: 1957-12-24
•
Expires: 1968-02-02
Abstract
No abstract record available.
Inventors
- 👤 Thomas P Evans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:44
CPC Classifications
G; G01; G01R; G01R13/00; G01R13/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1759604A
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US2110172A
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US1854640A
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US2103481A
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US1801657A
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US2095124A
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US1918834A
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US2094645A
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US2369619A
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US2413440A
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US2479881A
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US2486890A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-23 | 1961-06-24 | 1961-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-23 | 1965-06-24 | 1965-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-23 | 1969-06-24 | 1969-12-24 | $7700.00 | Window Closed / Lapsed |