US2841090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Revolving sleeve rotary vane pump
Assignee: Individual
•
Filing: 1955-03-14
•
Granted: 1958-07-01
•
Expires: 1975-03-14
Abstract
No abstract record available.
Inventors
- 👤 Frederick W Nuerwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:12
CPC Classifications
F; F04; F04C; F04C15/00; F04C15/0003; F04C15/0023; F04C2/00; F04C2/30; F04C2/40; F04C2/44
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US160974A
Cited
US383996A
Cited
US1153873A
Cited
CH97498A
Cited
FR586312A
Cited
US1818430A
Cited
CH156533A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-30 | 1961-12-30 | 1962-07-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-30 | 1965-12-30 | 1966-07-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-30 | 1969-12-30 | 1970-07-01 | $7700.00 | Window Closed / Lapsed |