US3439431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microwave dryer control circuit
Assignee: General Electric Co
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Filing: 1967-12-15
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Granted: 1969-04-22
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Expires: 1987-12-15
Abstract
No abstract record available.
Inventors
- 👤 Donald S Heidtmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:32
CPC Classifications
D; D06; D06F; D06F58/00; D06F58/20; D06F58/26; D06F58/266; G; G05; G05D; G05D22/00; G05D22/02; H; H03; H03K; H03K17/00; H03K17/28; H03K17/292; D06F2103/00; D06F2103/02; D06F2103/08; D06F2103/38; D06F2103/64; D06F2105/00; D06F2105/62; D06F34/00; D06F34/08; D06F58/32; D06F58/34; D06F58/36; D06F58/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |