US2816977A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control swtich
Assignee: SPX Technologies Inc
•
Filing: 1954-10-12
•
Granted: 1957-12-17
•
Expires: 1974-10-12
Abstract
No abstract record available.
Inventors
- 👤 Kramer Isaac A De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:53
CPC Classifications
H; H01; H01H; H01H3/00; H01H3/32; H01H3/50; H01H3/503; H01H11/00; H01H11/0006; H01H15/00; H01H15/02; H01H15/06; H01H15/10; H01H15/102
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US430748A
Cited
US1310111A
Cited
US1418748A
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US1096913A
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US1149787A
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US2289736A
Cited
US2471568A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-12-16 | 1961-06-17 | 1961-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-12-16 | 1965-06-17 | 1965-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-12-16 | 1969-06-17 | 1969-12-17 | $7700.00 | Window Closed / Lapsed |