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Patent US3456497A successfully refreshed from Google Patents.
US3456497A
Expired / Lapsed
US
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Engine performance monitoring system
Assignee: Entwicklungsring Sued GmbH
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Filing: 1967-06-06
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Granted: 1969-07-22
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Expires: 1987-06-06
Abstract
No abstract record available.
Inventors
- 👤 Erich Eberl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:19
CPC Classifications
G; G01; G01D; G01D7/00; G01D7/02; G01D7/04; G01D2207/00; G01D2207/10
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) | 1972-07-21 | 1973-01-20 | 1973-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-21 | 1977-01-20 | 1977-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-21 | 1981-01-20 | 1981-07-22 | $7700.00 | Window Closed / Lapsed |