US3527995A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single-phase to polyphase conversion system
Assignee: Harris Graphics Corp
•
Filing: 1967-04-12
•
Granted: 1970-09-08
•
Expires: 1987-04-12
Abstract
No abstract record available.
Inventors
- 👤 William H Lee
- 👤 Roger H Stotzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:32
CPC Classifications
H; H02; H02P; H02P27/00; H02P27/04; H02P27/06; H02M; H02M5/00; H02M5/02; H02M5/04; H02M5/22; H02M5/25; H02M5/27
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3256244A
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US3247432A
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US3183372A
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US3332002A
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US3249838A
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US3289071A
Cited
US3355653A
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US3221188A
Cited
US3435321A
Cited
US3394299A
Cited
US3319147A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-09-07 | 1974-03-09 | 1974-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-07 | 1978-03-09 | 1978-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-07 | 1982-03-09 | 1982-09-08 | $7700.00 | Window Closed / Lapsed |