Patent US3047790A successfully refreshed from Google Patents.
US3047790A
Expired / Lapsed
US
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Direct current modulator
Assignee: Bendix Corp
•
Filing: 1958-04-30
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Granted: 1962-07-31
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Expires: 1978-04-30
Abstract
No abstract record available.
Inventors
- 👤 Grosbaum Eugene
- 👤 Robert L Worthington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:34
CPC Classifications
H; H03; H03C; H03C1/00; H03C1/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2414102A
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US2475621A
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US2788493A
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US2889467A
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US2827611A
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US2926296A
Cited
US2900506A
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US2888622A
Cited
US2840726A
Cited
US2862171A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-30 | 1966-01-29 | 1966-07-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-30 | 1970-01-29 | 1970-07-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-30 | 1974-01-29 | 1974-07-31 | $7700.00 | Window Closed / Lapsed |