US2979135A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase synchronizing system
Assignee: Cook Electric Co
•
Filing: 1956-06-01
•
Granted: 1961-04-11
•
Expires: 1976-06-01
Abstract
No abstract record available.
Inventors
- 👤 Donald C Mcdonald
- 👤 Eugene A Reich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:46
CPC Classifications
G; G05; G05D; G05D3/00; G05D3/12; G05D3/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2382847A
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US2478279A
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US2543077A
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US2551306A
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US2517703A
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US2669312A
Cited
US2708258A
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US2747141A
Cited
US2878427A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-10 | 1964-10-10 | 1965-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-10 | 1968-10-10 | 1969-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-10 | 1972-10-10 | 1973-04-11 | $7700.00 | Window Closed / Lapsed |