US3471759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pulse width modulation servo system including a unique transformerless demodulator
Assignee: General Electric Co
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Filing: 1966-12-23
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Granted: 1969-10-07
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Expires: 1986-12-23
Abstract
No abstract record available.
Inventors
- 👤 Howard L Broverman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:22
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/20; H03F3/21; H03F3/217; H03F3/2173; G; G05; G05D; G05D3/00; G05D3/12; G05D3/14; G05D3/18; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/60; H03K17/615
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2478203A
Cited
US3260912A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-10-06 | 1973-04-07 | 1973-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-10-06 | 1977-04-07 | 1977-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-10-06 | 1981-04-07 | 1981-10-07 | $7700.00 | Window Closed / Lapsed |