US2579525A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rectangular and saw-tooth impulse generator
Assignee: Individual
•
Filing: 1942-06-19
•
Granted: 1951-12-25
•
Expires: 1962-06-19
Abstract
No abstract record available.
Inventors
- 👤 Arthur A Varela
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:13
CPC Classifications
H; H03; H03K; H03K12/00; H03K3/00; H03K3/02; H03K3/53; H03K3/55
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1613954A
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US2114938A
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US2118352A
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US2130132A
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US2221573A
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US2294863A
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US2411140A
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US2418128A
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US2419574A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-24 | 1955-06-25 | 1955-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-24 | 1959-06-25 | 1959-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-24 | 1963-06-25 | 1963-12-25 | $7700.00 | Window Closed / Lapsed |