US2833224A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary pumps
Assignee: Individual
•
Filing: 1956-03-05
•
Granted: 1958-05-06
•
Expires: 1976-03-05
Abstract
No abstract record available.
Inventors
- 👤 Owen A Meyer
- 👤 Sigurd J Andreasen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:30
CPC Classifications
F; F04; F04C; F04C2/00; F04C2/08; F04C2/082; F04C2/084
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US60366A
Cited
US638853A
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US698539A
Cited
US1103053A
Cited
US2407753A
Cited
US2383194A
Cited
US2530767A
Cited
US2567699A
Cited
US2697402A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-05-05 | 1961-11-04 | 1962-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-05-05 | 1965-11-04 | 1966-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-05-05 | 1969-11-04 | 1970-05-06 | $7700.00 | Window Closed / Lapsed |