US2980024A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable-delivery positive displacement pump
Assignee: Rolls Royce PLC
•
Filing: 1958-03-03
•
Granted: 1961-04-18
•
Expires: 1978-03-03
Abstract
No abstract record available.
Inventors
- 👤 Pope Joseph Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:20
CPC Classifications
F; F04; F04B; F04B1/00; F04B1/04; F04B1/06; F04B49/00; F04B49/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB110195A
Cited
GB146963A
Cited
US1724156A
Cited
DE622780C
Cited
GB446124A
Cited
US2337510A
Cited
US2439879A
Cited
US2571312A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-04-17 | 1964-10-17 | 1965-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-17 | 1968-10-17 | 1969-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-17 | 1972-10-17 | 1973-04-18 | $7700.00 | Window Closed / Lapsed |