US3439622A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor control circuit utilizing a voltage controlled rectifier
Assignee: Phillips Petroleum Co
•
Filing: 1966-09-02
•
Granted: 1969-04-22
•
Expires: 1986-09-02
Abstract
No abstract record available.
Inventors
- 👤 Richard O Welty
- 👤 George E Mader Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:38
CPC Classifications
H; H02; H02P; H02P7/00; H02P7/06; H02P7/18; H02P7/20; Y; Y10; Y10S; Y10S388/00; Y10S388/923; Y10S388/929
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3048030A
Cited
US3222586A
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US3284669A
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US3269320A
Cited
US3336517A
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US3343055A
Cited
US3334285A
Cited
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 |