US3399288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit breaking apparatus and method for pulse operated electronic switch
Assignee: Ingersoll Milling Machine Co
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Filing: 1965-06-01
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Granted: 1968-08-27
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Expires: 1985-06-01
Abstract
No abstract record available.
Inventors
- 👤 Schierholt Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:29
CPC Classifications
B; B23; B23H; B23H1/00; B23H1/02; B23H1/026; H; H02; H02H; H02H7/00; H02H7/10; H02H7/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-08-27 | 1972-02-26 | 1972-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-27 | 1976-02-26 | 1976-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-27 | 1980-02-26 | 1980-08-27 | $7700.00 | Window Closed / Lapsed |