US2585573A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable frequency power supply system
Assignee: Bryant Grinder Corp
•
Filing: 1948-10-29
•
Granted: 1952-02-12
•
Expires: 1968-10-29
Abstract
No abstract record available.
Inventors
- 👤 Willis F Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:04
CPC Classifications
H; H02; H02P; H02P25/00; H02P25/02; H02P25/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2070446A
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US2305581A
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US2260122A
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US2364644A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-02-11 | 1955-08-13 | 1956-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-02-11 | 1959-08-13 | 1960-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-02-11 | 1963-08-13 | 1964-02-12 | $7700.00 | Window Closed / Lapsed |