Patent US2589449A successfully refreshed from Google Patents.
US2589449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Movable vane pump
Assignee: Individual
•
Filing: 1943-10-15
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Granted: 1952-03-18
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Expires: 1963-10-15
Abstract
No abstract record available.
Inventors
- 👤 Sterling O Stageberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:08
CPC Classifications
F; F04; F04C; F04C15/00; F04C15/06; F01; F01C; F01C21/00; F01C21/08; F01C21/0809; F01C21/0818; F04C14/00; F04C14/18; F04C14/22; F04C14/223
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-18 | 1955-09-17 | 1956-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-18 | 1959-09-17 | 1960-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-18 | 1963-09-17 | 1964-03-18 | $7700.00 | Window Closed / Lapsed |