US3451147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Training system for the operation of industrial plants
Assignee: INST ENERGETIK
•
Filing: 1966-05-31
•
Granted: 1969-06-24
•
Expires: 1986-05-31
Abstract
No abstract record available.
Inventors
- 👤 Heinrike Mehlig
- 👤 Christian Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:02
CPC Classifications
G; G09; G09B; G09B25/00; G09B25/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2496617A
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US2808659A
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US2978594A
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US3058663A
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US3036772A
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US3031776A
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US3061945A
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US3146533A
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US3237318A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-06-23 | 1972-12-23 | 1973-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-23 | 1976-12-23 | 1977-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-23 | 1980-12-23 | 1981-06-24 | $7700.00 | Window Closed / Lapsed |