Patent US3031972A successfully refreshed from Google Patents.
US3031972A
Expired / Lapsed
US
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Free piston engine driven pump assembly
Assignee: Individual
•
Filing: 1957-06-17
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Granted: 1962-05-01
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Expires: 1977-06-17
Abstract
No abstract record available.
Inventors
- 👤 Janicke Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:54
CPC Classifications
B; B60; B60K; B60K17/00; B60K17/04; B60K17/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2230760A
Cited
US2303795A
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US2391972A
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US2454138A
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US2601756A
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US2564052A
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US2697548A
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US2863426A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-04-30 | 1965-10-30 | 1966-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-30 | 1969-10-30 | 1970-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-30 | 1973-10-30 | 1974-05-01 | $7700.00 | Window Closed / Lapsed |