US3421027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control for dynamoelectric machine having a pair of capacitive timing circuits interconnected to control firing of a triggered switch
Assignee: AO Smith Corp
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Filing: 1965-10-22
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Granted: 1969-01-07
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Expires: 1985-10-22
Abstract
No abstract record available.
Inventors
- 👤 John T Maynard
- 👤 Johnny Dah-Chun Yu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:22
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/72; H03K17/725; H02; H02P; H02P27/00; H02P27/02; Y; Y10; Y10S; Y10S388/00; Y10S388/907; Y10S388/917; Y10S388/919
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) | 1972-01-07 | 1972-07-08 | 1973-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-07 | 1976-07-08 | 1977-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-07 | 1980-07-08 | 1981-01-07 | $7700.00 | Window Closed / Lapsed |