Patent US3409842A successfully refreshed from Google Patents.
US3409842A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protection systems and apparatus
Assignee: ELECTRONIC MACHINE CONTROL SAL
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Filing: 1967-06-30
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Granted: 1968-11-05
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Expires: 1987-06-30
Abstract
No abstract record available.
Inventors
- 👤 Embling Kenneth Harry
- 👤 Lebar Leonard Cameron
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:27
CPC Classifications
H; H03; H03B; H03B5/00; H03B5/30; H03B5/32; H03B5/34; F; F16; F16P; F16P3/00; F16P3/12; F16P3/14; F16P3/148
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-11-05 | 1972-05-06 | 1972-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-11-05 | 1976-05-06 | 1976-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-11-05 | 1980-05-06 | 1980-11-05 | $7700.00 | Window Closed / Lapsed |