Patent US2731918A successfully refreshed from Google Patents.
US2731918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Motor pump unit
Assignee: —
•
Filing: —
•
Granted: 1956-01-24
•
Expires: 1973-01-24
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:52
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/66; F04D29/669; F04D13/00; F04D13/02; F04D13/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2480203A
Cited
US712022A
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US1425308A
Cited
DE500204C
Cited
US1974183A
Cited
GB403602A
Cited
GB405570A
Cited
FR794872A
Cited
US2422597A
Cited
US2554191A
Cited
US2520880A
Cited
US2485408A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-23 | 1959-07-25 | 1960-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-23 | 1963-07-25 | 1964-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-23 | 1967-07-25 | 1968-01-24 | $7700.00 | Window Closed / Lapsed |