US2951448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifugal pump and shaft sealing means
Assignee: Individual
•
Filing: 1945-11-13
•
Granted: 1960-09-06
•
Expires: 1965-11-13
Abstract
No abstract record available.
Inventors
- 👤 Frank C Rushing
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:15
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/08; F04D29/10; F04D29/12; F04D29/126; F04D29/128
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
GB190625100A
Cited
US1188189A
Cited
US1588126A
Cited
US1805335A
Cited
US1757670A
Cited
US1876520A
Cited
US2107035A
Cited
GB487897A
Cited
US2210088A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-06 | 1964-03-07 | 1964-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-06 | 1968-03-07 | 1968-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-06 | 1972-03-07 | 1972-09-06 | $7700.00 | Window Closed / Lapsed |