US3436642A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyphase to single phase static frequency multipliers with switching devices responsive to load conditions
Assignee: Park Ohio Holdings Corp
•
Filing: 1966-09-01
•
Granted: 1969-04-01
•
Expires: 1986-09-01
Abstract
No abstract record available.
Inventors
- 👤 Robert Sidney Segsworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:51
CPC Classifications
H; H02; H02M; H02M5/00; H02M5/02; H02M5/04; H02M5/22; H02M5/25; H02M5/27; H02M5/271; H03; H03B; H03B19/00; H03B19/06; H03B19/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3040230A
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US3054940A
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US3099784A
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US3270270A
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US3302093A
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US3295045A
Cited
US3337788A
Cited
US3332008A
Cited
US3315143A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |