Patent US2436876A successfully refreshed from Google Patents.
US2436876A
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US
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Rotary sliding vane pump structure
Assignee: Individual
•
Filing: 1943-07-29
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Granted: 1948-03-02
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Expires: 1963-07-29
Abstract
No abstract record available.
Inventors
- 👤 Alfred L Stamsvik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:09
CPC Classifications
F; F04; F04C; 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)
USRE22160E
Cited
GB189318329A
Cited
US629796A
Cited
US736850A
Cited
GB156947A
Cited
US1535998A
Cited
US1719801A
Cited
US2004958A
Cited
US2037894A
Cited
US2046873A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-02 | 1951-09-01 | 1952-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-02 | 1955-09-01 | 1956-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-02 | 1959-09-01 | 1960-03-02 | $7700.00 | Window Closed / Lapsed |