Patent US2428149A successfully refreshed from Google Patents.
US2428149A
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Impulse generator
Assignee: Farnsworth Television and Radio Corp
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Filing: 1943-10-18
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Granted: 1947-09-30
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Expires: 1963-10-18
Abstract
No abstract record available.
Inventors
- 👤 Alfred E Falk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:46
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/53; H03K3/55
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2146862A
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US2147472A
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US2265996A
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US2221569A
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US2188970A
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US2280949A
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US2301195A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-09-29 | 1951-03-31 | 1951-09-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-09-29 | 1955-03-31 | 1955-09-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-09-29 | 1959-03-31 | 1959-09-30 | $7700.00 | Window Closed / Lapsed |