US2469097A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable capacity sliding vane pump
Assignee: Individual
•
Filing: 1944-07-11
•
Granted: 1949-05-03
•
Expires: 1964-07-11
Abstract
No abstract record available.
Inventors
- 👤 Herbert A Wrenn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:15
CPC Classifications
F; F04; F04C; F04C14/00; F04C14/18; F04C14/22; F04C14/223; F04C2/00; F04C2/30; F04C2/34; F04C2/344; F04C2/3441; F04C2/3442
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
NL16175C
Cited
US1370810A
Cited
US1467837A
Cited
GB246460A
Cited
GB289260A
Cited
DE530603C
Cited
US2145872A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-02 | 1952-11-01 | 1953-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-02 | 1956-11-01 | 1957-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-02 | 1960-11-01 | 1961-05-03 | $7700.00 | Window Closed / Lapsed |