Patent US3493816A successfully refreshed from Google Patents.
US3493816A
Expired / Lapsed
US
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Relay control system with differential adjustment
Assignee: Cutler Hammer Inc
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Filing: 1967-06-30
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Granted: 1970-02-03
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Expires: 1987-06-30
Abstract
No abstract record available.
Inventors
- 👤 Robert E Monigal
- 👤 Richard B Ringle
- 👤 William C Swanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:53
CPC Classifications
H; H02; H02H; H02H3/00; H02H3/02; H02H3/06; H02H3/066; H01; H01H; H01H47/00; H01H47/02; H01H47/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3296498A
Cited
US3329869A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-02 | 1973-08-04 | 1974-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-02 | 1977-08-04 | 1978-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-02 | 1981-08-04 | 1982-02-03 | $7700.00 | Window Closed / Lapsed |